tag:blogger.com,1999:blog-1257219377828883192024-03-14T08:12:27.924+01:00PakaHuszarAll about my DIY electronics projectsSUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.comBlogger361125tag:blogger.com,1999:blog-125721937782888319.post-85860776541257527712024-01-09T05:15:00.004+01:002024-01-09T05:18:03.134+01:00I'm back - Thingiverse<p></p><div class="separator" style="clear: both; text-align: justify;"><span style="text-align: left;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhZseI-W7LREBubwTplFg7qeYs3fmvlFpk5xOA4ZEz-LoC2zTbm8488GK_JrVG0pqrqhhD07XGk0LeA1250A3USrcU0AkmiH9hLHWQxZOhs4UiEWVOzlXe0f9yXrE6b-9-XhlKGuPcv14sA7fctA8APXHR3EjwY5K_NmihhRPxlplrJl-A_GGDZDesIdfM" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="768" data-original-width="1024" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEhZseI-W7LREBubwTplFg7qeYs3fmvlFpk5xOA4ZEz-LoC2zTbm8488GK_JrVG0pqrqhhD07XGk0LeA1250A3USrcU0AkmiH9hLHWQxZOhs4UiEWVOzlXe0f9yXrE6b-9-XhlKGuPcv14sA7fctA8APXHR3EjwY5K_NmihhRPxlplrJl-A_GGDZDesIdfM" width="320" /></a></div><br /><br /></span></div><div class="separator" style="clear: both; text-align: justify;"><span style="text-align: left;">A few month ago I stopped to work on my hobby projects. I had many other things in my mind, changed my life a bit, restarted my photography hobby and so on.</span></div><p></p><p>In December I started to think about to continue my things, first in 3D printing, but not too much happened (I'll write about it later).</p><p>A few years ago when I involved myself in the 3D printing also registered an account on Thingiverse.</p><p>I published there a few things: <a href="https://www.thingiverse.com/suf/designs">https://www.thingiverse.com/suf/designs</a></p><p>After a while (not really remember exactly when) Thingiverse accused me with a copyright fraud and disabled my account. To understand, all of the designs I published designed by myself and not connected to any copyright protected thing, so I still don't understand why.</p><p>I took several attempts to recover my account - unsuccessfully, then I gave up.</p><p>Yesterday I got two notifications that somebody commented one of my designs and remixed it. It was interesting as I didn't se such in the last years.</p><p>Just tired to login. And miraculously it let me in.</p><p>I don't know what happened but I'm happy on it anyways. I just guess it has some connection with the recent events described here: <a href="https://3dprintingcenter.net/ultimaker-announces-a-major-update-to-the-thingiverse-platform/">https://3dprintingcenter.net/ultimaker-announces-a-major-update-to-the-thingiverse-platform/</a></p><p>Anyways, I'm happy with it. I feel that an indication to come back in many ways.</p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-36020349709494622162023-09-16T22:00:00.003+02:002023-09-17T09:09:59.331+02:00Building my rack(s)In my previous lab, I had a small (27U) rolling rack at the side of my desk. When it finally got its shape, I started to move to my new lab. The equipment removed the rack disassembled.<div><br></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisVwAeClLP1ANrn7EpXtqygoZTq8dGsK0KMqOhHU5HYrifRk6RcQ_2rqjulSGV9-C1IXAPz7QBvCRDvZxBkc0FWlriz9YVx6STmM8S-ekclju7WnMBFEHZpwyAvgjOOkHKRnTALODE2OY89zJsbxvZSJFQw4l0-YvW3GxPlcYrRaMjM3Jdv9NLIxA2DEA/s5020/Instrument%20Rack.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="5020" data-original-width="2418" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisVwAeClLP1ANrn7EpXtqygoZTq8dGsK0KMqOhHU5HYrifRk6RcQ_2rqjulSGV9-C1IXAPz7QBvCRDvZxBkc0FWlriz9YVx6STmM8S-ekclju7WnMBFEHZpwyAvgjOOkHKRnTALODE2OY89zJsbxvZSJFQw4l0-YvW3GxPlcYrRaMjM3Jdv9NLIxA2DEA/w193-h400/Instrument%20Rack.jpg" width="193"></a></div><br><div><br></div><div><br><div>I was a bit depressed on this as I had the feeling I'll never be able to put this together once again.</div><div>As I was reading things on the Facebook, I seen a guy trying to sell a whole bunch of outdated Cisco networking equipment. Nobody was interested, there came ugly comments on it, to throw the whole thing to the trash.</div></div><div>I seen a potential on something. Those Cisco units were installed into rack. So I wrote to him, if the rack containing the switches are on sale.</div><div>So I've two Rittal 42U height 600x800 racks for $100 each. I had some cleaning, metal work and paint repair with it (full repaint wasn't required, it has almost no rust just some dirt). One set of the vertical rails are not compatible, one rail mount was missing. Also I wanted open frame rack, so removed all of the doors, side panels, back panels.</div><div>Also I wanted to be able to move it on some rollers, but not every direction, just strictly need to pull out from the wall to be able to access the back. So I made legs with bearings as rollers.</div><div>In the last week finally put back most of the equipment to it (some not fit, it will be go into the other rack when I'll able to find time to rebuild the back vertical rails.</div><div><br></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCquOv-oT1FZlTeXoo-llWKn5wiHHRMqnkiqM0gwJzJ6A0tv9LxmpiCWhSVaE1wEUlSzo4Z2gv7vWg49rfrHaMxPZPYqyuAWzYyV2h2FjcY4XDz_zRCEWlv-oP_jJQEFWFCbvZCcO8sTUAixdvlnHx1MW5ZP9dAFPTnHl_BwEboN0URQnyRtPGATVfZ4s/s4032/2023-09-09%2015.40.22.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCquOv-oT1FZlTeXoo-llWKn5wiHHRMqnkiqM0gwJzJ6A0tv9LxmpiCWhSVaE1wEUlSzo4Z2gv7vWg49rfrHaMxPZPYqyuAWzYyV2h2FjcY4XDz_zRCEWlv-oP_jJQEFWFCbvZCcO8sTUAixdvlnHx1MW5ZP9dAFPTnHl_BwEboN0URQnyRtPGATVfZ4s/w300-h400/2023-09-09%2015.40.22.jpg" width="300"></a></div><br><div>One of my problems with the rack, how to access the equipment connectors on the back, from the front of the rack. I wanted something modular to be able to put various type of connectors to it.</div><div style="text-align: left;">Built a 1,5U unit onto the top of the previous rack from aluminum extrusion a 3D print. It failed. Wasn't precise enough, won't fit things I wanted to put in.<br>I was thinking about some Panduit modular patch panels, but never bought it. So just left it.</div><div style="text-align: left;">I put this thing to a side for years.</div><div style="text-align: left;">When I started to build my new rack a few month ago, I just seen something interesting on the net. Asked the owner, what he was using. It turned out, It is a Middle Atlantic Products UCP series modular kit: <a href="https://www.legrandav.com/products/accessories/connector_panels/ucp_hinged_frame_kit/ucp-sf">https://www.legrandav.com/products/accessories/connector_panels/ucp_hinged_frame_kit/ucp-sf</a></div><div style="text-align: left;">It has two issues for me: It is not on sale in Europe, it uses imperial screws what isn't easy to source here.</div><div>I designed and built a 3D printed 3U height modular front panel. It can accommodate 16 modules. It is great, I put it into the rack already, with the breakouts of the four channel HP 6627A power supply.</div><div><br></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUo5m3Pg-hS8XfbEnvUoWyPoXKeJA71Y31tXe2kYbfI8GTrTKuhsRYAAzmDFfSrH_xeQ-9iToAKobBXzNbcIJPrX15b8JgfGXwbDWCaJOvRyjjhoDtDKFvigOliBTj47nrpJdiZxjlLVGma6vxr2xaOUdY6jwgkN8SrkiSU9PcN4htuUupqYYNTJbDNWc/s6016/DSC_1613.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4016" data-original-width="6016" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUo5m3Pg-hS8XfbEnvUoWyPoXKeJA71Y31tXe2kYbfI8GTrTKuhsRYAAzmDFfSrH_xeQ-9iToAKobBXzNbcIJPrX15b8JgfGXwbDWCaJOvRyjjhoDtDKFvigOliBTj47nrpJdiZxjlLVGma6vxr2xaOUdY6jwgkN8SrkiSU9PcN4htuUupqYYNTJbDNWc/w400-h268/DSC_1613.JPG" width="400"></a></div><br><div>This could be the final solution, but...</div><div>...when it was already built just realized, there exists something called Eurorack Modular Synths. It perfectly match with my ideas. I bought two set of rails.</div><div><br></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEieq8CIhgyPLxjnDiSVEeJksbGH7AXpfoEYSsRyAe6-bn-1MlOZKCHrQlOBnKCDlpX57HXjm1EwTy28BnaGkrl2Wgq9nSHu5ymdXJk2CIQHqhcZf8Hc8PwbEpWAwNKYjPqbp565G5GYRAkylM1kZRXlKT-bVmCThiajCiCIMQ6dCSdOlZbeylgm2FU30kw/s6016/DSC_1617.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4016" data-original-width="6016" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEieq8CIhgyPLxjnDiSVEeJksbGH7AXpfoEYSsRyAe6-bn-1MlOZKCHrQlOBnKCDlpX57HXjm1EwTy28BnaGkrl2Wgq9nSHu5ymdXJk2CIQHqhcZf8Hc8PwbEpWAwNKYjPqbp565G5GYRAkylM1kZRXlKT-bVmCThiajCiCIMQ6dCSdOlZbeylgm2FU30kw/w400-h268/DSC_1617.JPG" width="400"></a></div><br><div>The 19" rack mount was not included, but by surprise, the original endpieces are already 3D printed</div><div><br></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_xJ8hQD0CL4KJw-O16-LY3fgQwoZYeAeivV9HRLFW6yTwS93FSaWyV85qvaNIIA31nbO3BbcXH4Qs-_0Vtn32ecTXRrQ-YYAdECH0NUQM1pRmXSSszUk1OTv3Ma2YT24-3baTZ-Rwx96s8HNzc55gTu_0P1oH-MeS05v80ZBRaCZgsKpV2NNI0Ke9IQk/s6016/DSC_1618.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4016" data-original-width="6016" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_xJ8hQD0CL4KJw-O16-LY3fgQwoZYeAeivV9HRLFW6yTwS93FSaWyV85qvaNIIA31nbO3BbcXH4Qs-_0Vtn32ecTXRrQ-YYAdECH0NUQM1pRmXSSszUk1OTv3Ma2YT24-3baTZ-Rwx96s8HNzc55gTu_0P1oH-MeS05v80ZBRaCZgsKpV2NNI0Ke9IQk/w400-h268/DSC_1618.JPG" width="400"></a></div><div><br></div><div>The plan is to design a new endpiece with rack ears.</div><div>In the first rack, I'll keep my original design, but in the further rack or racks I'll switch to EuroRack.</div><div>In the last few years I was mainly working with Kubernetes. For this I previously built a K3S cluster from 5 Pine A64 SBCs. It broke down (dead SD cards), but I intend to rebuild it.</div><div>I thought, it would be a great idea to put these units into the modular front panel. Designed a holder for it.</div><div><br></div><div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjm5LwuHlNxu29Gsw35wkSy8IntdA8YB7iYM1wJF_zWIj1GdTuNfGV9TS37DpkUpzZugXmacnMU9HG24dJiDDLPng1uU74wA77Ghhq_UFzvWwLx0j4behIVVx0PAB2aF-zwuzkN5dKYJAZpnn69FljuTSwZrnyM3Y-SwVBdZO7n2aBnZjlCKCtgElWB50I/s1578/Pine%20A64.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1035" data-original-width="1578" height="263" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjm5LwuHlNxu29Gsw35wkSy8IntdA8YB7iYM1wJF_zWIj1GdTuNfGV9TS37DpkUpzZugXmacnMU9HG24dJiDDLPng1uU74wA77Ghhq_UFzvWwLx0j4behIVVx0PAB2aF-zwuzkN5dKYJAZpnn69FljuTSwZrnyM3Y-SwVBdZO7n2aBnZjlCKCtgElWB50I/w400-h263/Pine%20A64.JPG" width="400"></a></div><br><div class="separator" style="clear: both; text-align: center;"><br></div>Didn't print it when the design was ready as my printer had issues, later I didn't find time for it.</div><div><br></div><div>To be honest, I done not too much in my electronics project during the summer. The PCBWay asked, if I have problems - absolutely not - and suggested why I don't try out their 3D printing and CNC machining capability.</div><div><br></div><div>I was thinking this is a perfect opportunity for this. Made a quotation to this in PETG and some small part in resin. I can tell you, I was shocked. Mainly in the resin prices.</div><div>If the things I'm trying to print with a resin printer coming on these prices, absolutely nothing justify keeping my resin printer in the future.</div><div>Now the quotation is on. I'll write about the experience and my further way in 3D printing when the printed parts arrive into my hands for inspection.</div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-22203167999424685222023-09-05T10:00:00.001+02:002023-09-05T10:04:33.801+02:00Fluke 787 "Repair"Big thank you for DuraLeak.<br /><br />"i purchased this at an estate sale. i don't know if it works or how to turn it on. but as it is right now i have pushed every button and nothing comes on the screen. so because of that i am selling it for parts or repair."<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOsqkxBbYjRkiojvA6nZu-5O_twwwNqn1Zt2G7Qol8_9xt9dv2zoqC0IuXfsRutm2EhpHv-Khn-wjSRK9hFr5f2uby7EBFIw0G0FlxNMKVTbdEfuOFnp39QEugu2jLDL8q7buYfqC3TbsZ0crH3kAz-n2se9idJ6kycMm66WTnpJtZobfvG2aQeGZrFPo/s4032/2023-09-05%2009.55.23.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhOsqkxBbYjRkiojvA6nZu-5O_twwwNqn1Zt2G7Qol8_9xt9dv2zoqC0IuXfsRutm2EhpHv-Khn-wjSRK9hFr5f2uby7EBFIw0G0FlxNMKVTbdEfuOFnp39QEugu2jLDL8q7buYfqC3TbsZ0crH3kAz-n2se9idJ6kycMm66WTnpJtZobfvG2aQeGZrFPo/w300-h400/2023-09-05%2009.55.23.jpg" width="300" /></a></div><br /><div>Perfectly working Fluke 787 Processmeter for $143 delivered to Hungary</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDPw6j88nOw-2SdJgfPml8I4dw5nd5G-1N_7Oc8DjK2N2fQEcWvgMiBDiUin2z397hkPmov8lDhEhzez7uxp8SHw49TKZXaJWpCYo4Cx-xjmjKfx7M6zQauKHnm1OJ4gwSjjgAnFaJOkj-NocuqAN3z7fW6JeGOfuTP0VkwwJGQeaDRUTDxSVljnqEczE/s4032/2023-09-05%2009.55.01.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDPw6j88nOw-2SdJgfPml8I4dw5nd5G-1N_7Oc8DjK2N2fQEcWvgMiBDiUin2z397hkPmov8lDhEhzez7uxp8SHw49TKZXaJWpCYo4Cx-xjmjKfx7M6zQauKHnm1OJ4gwSjjgAnFaJOkj-NocuqAN3z7fW6JeGOfuTP0VkwwJGQeaDRUTDxSVljnqEczE/w300-h400/2023-09-05%2009.55.01.jpg" width="300" /></a></div><br /><div>I need some future tests, but looks ok, for the first sight.</div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-85128034237714489352023-08-27T11:03:00.001+02:002023-08-27T11:03:52.881+02:00Dumpster Dive - "woodwork"A few days ago, I found this nice table frame next to the dumpster.<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXoNdMu_MidA1OBtCXmW1GmJfbaI0v87_YcJglC7hnEo4_H1LzpkHV1o8rmuNYkLrGf9-iMD2hD12dN6kFV6AWKLvK_3sXfyiM4_6dsqCp6PbuHp19oxCeLxVr7XCclJcqWjN-Va4xkOX4qCb_vP50QvUjHMqkcgXe4eP5UHFP6TvyX4ENt3lpPZVoA8o/s6016/DSC_1629.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="6016" data-original-width="4016" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXoNdMu_MidA1OBtCXmW1GmJfbaI0v87_YcJglC7hnEo4_H1LzpkHV1o8rmuNYkLrGf9-iMD2hD12dN6kFV6AWKLvK_3sXfyiM4_6dsqCp6PbuHp19oxCeLxVr7XCclJcqWjN-Va4xkOX4qCb_vP50QvUjHMqkcgXe4eP5UHFP6TvyX4ENt3lpPZVoA8o/w429-h640/DSC_1629.JPG" width="429" /></a></div><br /><div><br /></div><div><br /></div><div>From the paper box next to it I seen some broken glass, so I suspect it was a glass table before, but the tabletop broken. The owner just thrown it away. Actually it has no issues other than the missing top.</div><div>Yesterday I went around the city for some shopping.</div><div>Find a 120x70 LDF (not that shitty paper filled crap they mainly sell nowadays) tabletop in the IKEA (it is exactly 15cm larger than the frame in every direction) and bought some aluminum L extrusion in the Bauhaus.</div><div>Todays work:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifL1HbSi-BKMUb_0D6kvPTQ77khwoN4Pf_DKhbHbT3qj9oblpXsHvEiFNUN_spPEZHSUzjSRPPVIX4LEYb9bHbdKFSEuBLcUJ6U6k7cgp1F3h-6BIaMbtsZ4w7YZOk5f1h6VjIlvHqKIVWxmPnvSon47cQ1CmsCIbYadTYt9NFOmq2ANDr4P4mN81_Clk/s4032/2023-08-27%2009.20.36.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifL1HbSi-BKMUb_0D6kvPTQ77khwoN4Pf_DKhbHbT3qj9oblpXsHvEiFNUN_spPEZHSUzjSRPPVIX4LEYb9bHbdKFSEuBLcUJ6U6k7cgp1F3h-6BIaMbtsZ4w7YZOk5f1h6VjIlvHqKIVWxmPnvSon47cQ1CmsCIbYadTYt9NFOmq2ANDr4P4mN81_Clk/w300-h400/2023-08-27%2009.20.36.jpg" width="300" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgirUrlpVtP1tQHdTnjsy8lmWP9Ou2Rj7ZG5cc-tgZ7HOZOsqgaiSxwl28I180U3nwO2hAAU8CGXpoDGl1ZzoRQxRjVcwfdiIL4Ny6vp6juSwASrAWXJ-2xxcqxvz_L7GF-6p00UOVi7Ig0CAtPslf5fVeRqGHa_efnKAjwYBo-vyloBnH6QVw1z0UtBiI/s4032/2023-08-27%2009.44.48.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgirUrlpVtP1tQHdTnjsy8lmWP9Ou2Rj7ZG5cc-tgZ7HOZOsqgaiSxwl28I180U3nwO2hAAU8CGXpoDGl1ZzoRQxRjVcwfdiIL4Ny6vp6juSwASrAWXJ-2xxcqxvz_L7GF-6p00UOVi7Ig0CAtPslf5fVeRqGHa_efnKAjwYBo-vyloBnH6QVw1z0UtBiI/w400-h300/2023-08-27%2009.44.48.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmLcX6LkxRofDnjlUzOuqenQfmVamu5Zd0M5SdEU-eaBOihzDsChUAKHpydcIT-e0cV6VMqd5mprPuuE8BZLLFJd31t_Mwuf8d-evxmLur5WrABcrgxz2Mfc1AHTfODw34o4u36i02bUEY9zi0pIc3d8wOLERxeJ-FEhHcPC12H_EEAlSUMXYufsAD5j8/s4032/2023-08-27%2009.47.53.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmLcX6LkxRofDnjlUzOuqenQfmVamu5Zd0M5SdEU-eaBOihzDsChUAKHpydcIT-e0cV6VMqd5mprPuuE8BZLLFJd31t_Mwuf8d-evxmLur5WrABcrgxz2Mfc1AHTfODw34o4u36i02bUEY9zi0pIc3d8wOLERxeJ-FEhHcPC12H_EEAlSUMXYufsAD5j8/w400-h300/2023-08-27%2009.47.53.jpg" width="400" /></a></div><div class="separator" style="clear: both; text-align: center;">Ooops, a scratch I made while putting it onto the tabletop</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggzSjIlJ5fQSubIbF-7_HbGZ1gNpy5cXh0c33SGxrFaVhKImYfYZ3ZiETzf5mo8eM23SzHiD5SeTxc8a5FBHdHZkKuVcsXKelgaRLo_WFuQZGPtiM4B_R-frlMJJZ6dTyn4pOuKR2I_7ErduyWlPfJwDNYt1UTuU0jJyjcpfFQ2yFq2XLtpK3n6iSPfds/s4032/2023-08-27%2009.48.02.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggzSjIlJ5fQSubIbF-7_HbGZ1gNpy5cXh0c33SGxrFaVhKImYfYZ3ZiETzf5mo8eM23SzHiD5SeTxc8a5FBHdHZkKuVcsXKelgaRLo_WFuQZGPtiM4B_R-frlMJJZ6dTyn4pOuKR2I_7ErduyWlPfJwDNYt1UTuU0jJyjcpfFQ2yFq2XLtpK3n6iSPfds/w400-h300/2023-08-27%2009.48.02.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-WeaXyNfU5j83TA0iZ5Ze6mLTIP85iiQ9_cQKgEqaiKUixhgVoANwbFE2E7YKKGAGlFCACx-nSwPHaKpXxs1inn1tr8Q_uE-okGM79VlUz6HRZmAkhaDn5XADdYiQYnhQmnSqLnNpzDZvW8_HsBeeemz0fXrRD2Mv3YjK7eVvy4ML-UpT27kz7l_yQSY/s4032/2023-08-27%2010.01.54.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-WeaXyNfU5j83TA0iZ5Ze6mLTIP85iiQ9_cQKgEqaiKUixhgVoANwbFE2E7YKKGAGlFCACx-nSwPHaKpXxs1inn1tr8Q_uE-okGM79VlUz6HRZmAkhaDn5XADdYiQYnhQmnSqLnNpzDZvW8_HsBeeemz0fXrRD2Mv3YjK7eVvy4ML-UpT27kz7l_yQSY/w400-h300/2023-08-27%2010.01.54.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLnWqfmoYuxjmjrJJgNQrY5yguDMEnxsXkpAjemJVx42UMQ27Xv7V96xpQYH89bvFrrjcSvYdDlcC042R3iQoU-OO45p82OEwPSxhZ1OA8L5kCfw3AZvymhkn7Jt15VNfEUdFdfjb_-yAUzF4-Cn2cbQprK8eRkWZWokmVCxQl2Da29x8KR48CVuGs59c/s4032/2023-08-27%2010.08.22.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLnWqfmoYuxjmjrJJgNQrY5yguDMEnxsXkpAjemJVx42UMQ27Xv7V96xpQYH89bvFrrjcSvYdDlcC042R3iQoU-OO45p82OEwPSxhZ1OA8L5kCfw3AZvymhkn7Jt15VNfEUdFdfjb_-yAUzF4-Cn2cbQprK8eRkWZWokmVCxQl2Da29x8KR48CVuGs59c/w400-h300/2023-08-27%2010.08.22.jpg" width="400" /></a></div><div class="separator" style="clear: both; text-align: center;">I found the function it also - Resin 3D printing and ultrasound cleaning station</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjw7GeBf2DKj0ucoSADos6XFtY5p-04jD576wSJOPwuop35fAX_-RIB2M-8dsBSOosDbKAQpETsq38EEkDSLIVZZm3IqKUaQmmyFnyu4SMiP1OPy-I0Bgy1DIthbzxj3HdZ2f048c328ce0q1SE8rJanpzhy0rbHTEL8bH5ZPVTc3T4aAa03lni4ZB5pUI/s4032/2023-08-27%2010.08.26.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjw7GeBf2DKj0ucoSADos6XFtY5p-04jD576wSJOPwuop35fAX_-RIB2M-8dsBSOosDbKAQpETsq38EEkDSLIVZZm3IqKUaQmmyFnyu4SMiP1OPy-I0Bgy1DIthbzxj3HdZ2f048c328ce0q1SE8rJanpzhy0rbHTEL8bH5ZPVTc3T4aAa03lni4ZB5pUI/w400-h300/2023-08-27%2010.08.26.jpg" width="400" /></a></div><div class="separator" style="clear: both; text-align: center;">Also accommodate some chemicals</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJDoh7m8RaySvASgFQMO9DHhw8zBrevcEVCedG1uHOUETXF5p2_VGxBiA5FZ5LuILll7HE7lbYHl3fOjajtFkUb4kdJ8KlW4gt0hu2rgDrD7jBQuLta8h249_nzWdqbNgRcAsNlmeTfGj-b940OplMNyg_eNbIqpa_lu92hUmlRI7ya99R5PoxgEijzGA/s4032/2023-08-27%2010.08.33.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJDoh7m8RaySvASgFQMO9DHhw8zBrevcEVCedG1uHOUETXF5p2_VGxBiA5FZ5LuILll7HE7lbYHl3fOjajtFkUb4kdJ8KlW4gt0hu2rgDrD7jBQuLta8h249_nzWdqbNgRcAsNlmeTfGj-b940OplMNyg_eNbIqpa_lu92hUmlRI7ya99R5PoxgEijzGA/w300-h400/2023-08-27%2010.08.33.jpg" width="300" /></a></div><div class="separator" style="clear: both; text-align: center;">and the 3D printer spare parts</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhF_Idu4Mw7yJUB4xEVv4tUcTYq_HJFEnHJ8FXvsjclqfhH0RUP5KqznmaUE8lXix217AqwoOnQyJ87psm5ukD5Rz-ro2tlGKWo0FB83IjXUPIdKMrS6ESMzf-ETGnz450YRkoohLuJ9qUX9nB5gxdIeBQiNu2akP2JM1RtBd_8VhdUwCqNKMj_bicATPc/s4032/2023-08-27%2010.08.44.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhF_Idu4Mw7yJUB4xEVv4tUcTYq_HJFEnHJ8FXvsjclqfhH0RUP5KqznmaUE8lXix217AqwoOnQyJ87psm5ukD5Rz-ro2tlGKWo0FB83IjXUPIdKMrS6ESMzf-ETGnz450YRkoohLuJ9qUX9nB5gxdIeBQiNu2akP2JM1RtBd_8VhdUwCqNKMj_bicATPc/w300-h400/2023-08-27%2010.08.44.jpg" width="300" /></a></div><div class="separator" style="clear: both; text-align: center;">Excess paint</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiktUVoDf7T6PwtWa7FIAoBwvs5b2l1hZMW9CueaM2WQumZAugEVyiLewqlPrQGbwy0XXrKxtmsK3UkWWU0Ua357NdFdtGFHQ5FoOyfs4xfaCw0qwjOhu2viKzmML7CUOXKrsYNZvb1aG3ozpS5DReuXaa-j2PlrdH54_yCDNKW5H-RpiZSwVG7p5vaIS4/s4032/2023-08-27%2010.08.50.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiktUVoDf7T6PwtWa7FIAoBwvs5b2l1hZMW9CueaM2WQumZAugEVyiLewqlPrQGbwy0XXrKxtmsK3UkWWU0Ua357NdFdtGFHQ5FoOyfs4xfaCw0qwjOhu2viKzmML7CUOXKrsYNZvb1aG3ozpS5DReuXaa-j2PlrdH54_yCDNKW5H-RpiZSwVG7p5vaIS4/w300-h400/2023-08-27%2010.08.50.jpg" width="300" /></a></div><div class="separator" style="clear: both; text-align: center;">And even some free space also left</div><br /><div><br /></div><div><br /></div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-56269111855148842332023-08-22T18:33:00.004+02:002023-08-22T18:33:37.139+02:00Photography<p>There is some (re)addition to my hobbies.</p><p>A few years ago (mainly at the film based era), I was seriously involved in the amateur photography. Went nowhere without an SLR camera. A few years ago, this swept away a bit. There are many reason behind it. I guess the main reason was the better and better cameras in the smart phones.</p><p>Anyway, I was never completely satisfied with the performance of it. It was good for documenting my electronics projects but... It was good for my daily needs but...</p><p>Then the COVID came. It bring with it a closing down the things. Working in IT with cloud technologies bring almost zero need to go to into an office. My main hobby (still will be) electronics is connected to my lab, what is a closed space. Actually days passed by without going out to the street.</p><p>It looks like two and a half year was the limit to me to be able to tolerate this kind of lifestyle. Enough.</p><p>So a few weeks ago, I took out my photo equipment from the locker and started to use it. With it, go out to the city, to countryside, just for taking pictures. I love this feeling.</p><p>I also plan to move from phone to this equipment also for other photo/video related activities. For this plan, I started to upgrade my set a bit. It doesn't mean buying new equipment. Much more started to collect 2nd hand tools. Added an FX camera (Nikon D610) to be able to utilize the lenses from my film era. Added macro lenses for my object photography goals.</p><p>The current set:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiBCac3riI1Ta3crzDIFQuLs33ZSOs6MNdap9VfQn0_hSdzItbNuaFaizgChCR-0QyHRfKNnFPXdiY2rZE76APvy1yBx42vEKEfQfPS8W1C1LILumklrMP68GQR_mO3b_trrJArGO0dHVD0mSqvNcWjBmL-yW4bwcb3wNfLuggqPap_b0BnGw5PsRY2Vfo/s4032/2023-08-22%2017.44.18.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiBCac3riI1Ta3crzDIFQuLs33ZSOs6MNdap9VfQn0_hSdzItbNuaFaizgChCR-0QyHRfKNnFPXdiY2rZE76APvy1yBx42vEKEfQfPS8W1C1LILumklrMP68GQR_mO3b_trrJArGO0dHVD0mSqvNcWjBmL-yW4bwcb3wNfLuggqPap_b0BnGw5PsRY2Vfo/w400-h300/2023-08-22%2017.44.18.jpg" width="400" /></a></div><p>My new photography journey starts here.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFuscCj1yz4QrovFTPlic2Hg0BkettQk8DOSA9ohY2p1qPhFa-Dd32h5LmkveMJYamkt2gqIK_MfxoyCrhpdoHRSaC1988DfhezKWoeTVVhJ9aGhxDyecyD_Tp3uiEdnTueCi6j-W0Zh4WaTmCY4daTPIwOwiE9htRumfvzm1C65ZCRmmx_1q1MBPeOqo/s3565/20230822_Self.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2761" data-original-width="3565" height="310" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFuscCj1yz4QrovFTPlic2Hg0BkettQk8DOSA9ohY2p1qPhFa-Dd32h5LmkveMJYamkt2gqIK_MfxoyCrhpdoHRSaC1988DfhezKWoeTVVhJ9aGhxDyecyD_Tp3uiEdnTueCi6j-W0Zh4WaTmCY4daTPIwOwiE9htRumfvzm1C65ZCRmmx_1q1MBPeOqo/w400-h310/20230822_Self.jpg" width="400" /></a></div><br /><p><br /></p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-45273849958869721122023-06-28T20:41:00.000+02:002023-06-28T20:41:01.361+02:00Keithley 2700 - Repair 2.After some serious issues with the local post, Today the new mains transformer of the 2700 landed in my hands.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYq2KONKAObH2VcYOG3D7vCBWZDRvLTq5-3gcBwPtz5p9uTmpbbX4CVOiiAAxJEEIsIYxCt63ooxoPxI7PSytiZX_aoYk16lEehBd8yPTbhzy9J-Yl4bvutvl7gBc6TdqujwyXKSW6B5UAoAcweeyZd4YXyJMfXK5hVXyXa8QaNDe8n08frixWLF-l2O0/s4032/2023-06-28%2017.55.32.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYq2KONKAObH2VcYOG3D7vCBWZDRvLTq5-3gcBwPtz5p9uTmpbbX4CVOiiAAxJEEIsIYxCt63ooxoPxI7PSytiZX_aoYk16lEehBd8yPTbhzy9J-Yl4bvutvl7gBc6TdqujwyXKSW6B5UAoAcweeyZd4YXyJMfXK5hVXyXa8QaNDe8n08frixWLF-l2O0/w300-h400/2023-06-28%2017.55.32.jpg" width="300" /></a></div><br /><div>So I measured a bit, then installed into the unit.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFNZZi78ZI-lsh4v1JYMFC-iZDZe8xs7HunUptXxMiKbLpdt8XpwkeUYqwJigQ5vuUbmidez6tBHf9CVwn1vB_jOxco70OEtHLs1br8CA3eIfZp3Z75na-7nq0zRvSxkLq0LKHEyMI-PhU5-yDipUvdifvyeTDFdFNsLcNX00aP3MfPLZLw-kuCU6tlpk/s4032/2023-06-28%2019.39.42.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFNZZi78ZI-lsh4v1JYMFC-iZDZe8xs7HunUptXxMiKbLpdt8XpwkeUYqwJigQ5vuUbmidez6tBHf9CVwn1vB_jOxco70OEtHLs1br8CA3eIfZp3Z75na-7nq0zRvSxkLq0LKHEyMI-PhU5-yDipUvdifvyeTDFdFNsLcNX00aP3MfPLZLw-kuCU6tlpk/w300-h400/2023-06-28%2019.39.42.jpg" width="300" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbbXJpHE8Bh1WOeD3WI_8bqD-AcRRQB0HmfOTZF6a7z_Q_k6RZL6My_2s8qmgYVbUMiALmsg7n9KUY3WSXRHWLsQqQn8_iik6UqddPTt3aZqkBlAbuN0DI5eCyEVssV6PLWiZiP07bFzFlrrfDHUtaK1T8AZ-L_YFBf-6lnB0oX2LlYrBojjP9qSCBVrU/s4032/2023-06-28%2019.39.31.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbbXJpHE8Bh1WOeD3WI_8bqD-AcRRQB0HmfOTZF6a7z_Q_k6RZL6My_2s8qmgYVbUMiALmsg7n9KUY3WSXRHWLsQqQn8_iik6UqddPTt3aZqkBlAbuN0DI5eCyEVssV6PLWiZiP07bFzFlrrfDHUtaK1T8AZ-L_YFBf-6lnB0oX2LlYrBojjP9qSCBVrU/w300-h400/2023-06-28%2019.39.31.jpg" width="300" /></a></div><br /><div>Actually it was pretty straightforward. Everything connected, assembled.</div><div>After some warmup I compared with my 7.5 digit Keithley 2010. It looks like spot on (the Digistant source not really able to keep with them).</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-m9VY5MAkqpmYfV6PG6U6FJRCeLIRZNfdPOstZh4Tc1uIctYIgZIVz0Qh1lEg3ANp4ANFGCHvL0jZFVJtmy7ewWaDtKxu16MkQ4fhVGInYky3UuVRpqWCodteQCwttAZk8pNisYCet4cMxcB2jgquH1RTewyIdA90Iu1emHtRQ9yXxoAEF6YF7aLPEGA/s4032/2023-06-28%2020.28.50.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-m9VY5MAkqpmYfV6PG6U6FJRCeLIRZNfdPOstZh4Tc1uIctYIgZIVz0Qh1lEg3ANp4ANFGCHvL0jZFVJtmy7ewWaDtKxu16MkQ4fhVGInYky3UuVRpqWCodteQCwttAZk8pNisYCet4cMxcB2jgquH1RTewyIdA90Iu1emHtRQ9yXxoAEF6YF7aLPEGA/w400-h300/2023-06-28%2020.28.50.jpg" width="400" /></a></div><br /><div><br /></div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-47018026424021715682023-06-13T20:38:00.002+02:002023-06-13T20:38:51.731+02:00Repair Manifesto<p>I just found this in a group. I can't resist to share it.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihfPxv2R5p6dzi0c4htBapmMinHIIyUDLE1jcWlwm1agUuljEgqGjwArReAQTlNAejCKkxldH1bcKV3rHZA5J_531W90vB9sXSxddGhtdleqPWkI3Aucx-x5Q1RD6at9BHMjS5Oy0Mbg7NBwmvLHlRukMVPlBmAQLp6LafOzG99Kn00kdFi8ojE87p/s813/Repair%20Manifesto.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="813" data-original-width="526" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihfPxv2R5p6dzi0c4htBapmMinHIIyUDLE1jcWlwm1agUuljEgqGjwArReAQTlNAejCKkxldH1bcKV3rHZA5J_531W90vB9sXSxddGhtdleqPWkI3Aucx-x5Q1RD6at9BHMjS5Oy0Mbg7NBwmvLHlRukMVPlBmAQLp6LafOzG99Kn00kdFi8ojE87p/w414-h640/Repair%20Manifesto.jpg" width="414" /></a></div><br /><p><br /></p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-89333281267041092082023-06-12T22:00:00.001+02:002023-06-12T22:21:13.245+02:00Reference Resistors<p>A friend of mine asked me for a quick project (finally it become not so quick, but just because the time it required the parts to arrive).</p><p>He is installing pool and other water handling related systems. One of the pool measure system has PT100 temperature sensor input what need calibration. The proper calibration equipment cost a fortune. Actually he only need two reference point. For this he asked me to make some reference resistors in a box what is precise enough and has low tempco.</p><p>The values are 100 ohms and 119.4 ohms what is weird a bit. Looked around and find the required resistors in 0603 and 0805 size (100 and 120 ohms 0.01% 2ppm) around $10 each. For the 119.4 ohms I planned 24k in parallel with the 120 ohms (bit less precision as there is not needed better).</p><p>I bought some tiny aluminum boxes from the AliExpress. The idea to change the front plate of the boxes to a PCB add the screw-in banana sockets and put the resistors to the back of the boards.</p><p>It looks like this:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhd_g-Ktir5Gy5mIpzo1vMfCQjLSqveOJTU6fluRHrlDMWPptLuBnlCSz7WwGlhxzSoVZMtdKuFY04dO7qbP4ouy8HsZR9_5tw9TQ0TzO0HLgvu8W2K1frZFXNv50v2MPiiZaeGHEcr8mgi2vHgZEq_T6YgH2aJgFkpq-vkJL7CL9wx_dwS_CXVs2WZ/s2048/SMD%203D.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1030" data-original-width="2048" height="201" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhd_g-Ktir5Gy5mIpzo1vMfCQjLSqveOJTU6fluRHrlDMWPptLuBnlCSz7WwGlhxzSoVZMtdKuFY04dO7qbP4ouy8HsZR9_5tw9TQ0TzO0HLgvu8W2K1frZFXNv50v2MPiiZaeGHEcr8mgi2vHgZEq_T6YgH2aJgFkpq-vkJL7CL9wx_dwS_CXVs2WZ/w400-h201/SMD%203D.jpg" width="400" /></a></div><p>It was manufactured by PCBWay in the usual excellent quality - Thank you!</p><p>I was a bit afraid, if they can follow my request and put the order number to the already crowded component side, but it was managed without problem. It arrived together with my VFD project board, what I'll write about later.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEim8vsc9GC--zTZnKaxh0VhbeXk1P7zkpixpm2Vr_C2l9u52f_hq_7C1r-6NbkXL0RkxqcILoIaQaol_6rsZcFBG28uPOJIkb1dKBakCFvohzTSBAuf6-z39rxVzSV1y2TC20F1cAYY1Tm0CT378Xg1jj3jR-IuZkSTe3GP2EX-HUOdaH1gzRhhVwSj/s3747/boards.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1649" data-original-width="3747" height="176" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEim8vsc9GC--zTZnKaxh0VhbeXk1P7zkpixpm2Vr_C2l9u52f_hq_7C1r-6NbkXL0RkxqcILoIaQaol_6rsZcFBG28uPOJIkb1dKBakCFvohzTSBAuf6-z39rxVzSV1y2TC20F1cAYY1Tm0CT378Xg1jj3jR-IuZkSTe3GP2EX-HUOdaH1gzRhhVwSj/w400-h176/boards.jpg" width="400" /></a></div><br /><p>The board soldered (Yes, it is a joke. Only one single resistor in this case)</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhChZo_QwhnnWLIuAzHapdKxVe1jUwyzyTjXiRqJ91t3ItRZQTQ2O8lSzIGAJC82MN5GM_29E2INl-U_PpkoHYgHH2rnfa6eQz1LS3K8h9RZ1PTrdN4JAnEQlybn6UwkGnzT8lcsjVAQ3N0QVLD7HxaYtB0FrqMTleCiK44aQyGEPDHHh2mLJFnbftb/s2472/resistor%20board.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1222" data-original-width="2472" height="198" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhChZo_QwhnnWLIuAzHapdKxVe1jUwyzyTjXiRqJ91t3ItRZQTQ2O8lSzIGAJC82MN5GM_29E2INl-U_PpkoHYgHH2rnfa6eQz1LS3K8h9RZ1PTrdN4JAnEQlybn6UwkGnzT8lcsjVAQ3N0QVLD7HxaYtB0FrqMTleCiK44aQyGEPDHHh2mLJFnbftb/w400-h198/resistor%20board.jpg" width="400" /></a></div><br /><p>Some measurements</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOsHKCM2TcEBAwxcRPRFO6pbtx0QlDN88OVlefhwRgdLUe1nmGTAh_JJWWcGR8YhU5RFyuWQIGGJ-hNe4z38N_afnG5p7srQ7isIwGkfxBOs4Zt5uwB_504of7FBxOrWRK6oLPrdPWeswMOldSPl-K5Tof5d5PgrwDtM6P2Gn_HieY6J9X4zARUiUZ/s4032/2023-06-11%2020.42.20.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOsHKCM2TcEBAwxcRPRFO6pbtx0QlDN88OVlefhwRgdLUe1nmGTAh_JJWWcGR8YhU5RFyuWQIGGJ-hNe4z38N_afnG5p7srQ7isIwGkfxBOs4Zt5uwB_504of7FBxOrWRK6oLPrdPWeswMOldSPl-K5Tof5d5PgrwDtM6P2Gn_HieY6J9X4zARUiUZ/w400-h300/2023-06-11%2020.42.20.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9gy-WK4TQf7h4J5XSZgZuPRCur-imlt07yc9bgTPi5qh8FurU3ez5ecsJ2tsXpezpOW0TOoCfS6MzfGLl4ss4rKMVsd6zidXy_pLNHa2-_8UVB12R7HhUPHSMs6X7DP5WC0t56OZGM6L0z5KfIWfC3_BlVk2EFp5jOmRuZ2NLmRMDCYY146cL2eAA/s4032/2023-06-11%2021.31.33.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9gy-WK4TQf7h4J5XSZgZuPRCur-imlt07yc9bgTPi5qh8FurU3ez5ecsJ2tsXpezpOW0TOoCfS6MzfGLl4ss4rKMVsd6zidXy_pLNHa2-_8UVB12R7HhUPHSMs6X7DP5WC0t56OZGM6L0z5KfIWfC3_BlVk2EFp5jOmRuZ2NLmRMDCYY146cL2eAA/w400-h300/2023-06-11%2021.31.33.jpg" width="400" /></a></div><br /><p>If I count the cable and the plugs contact resistance is the result get even better. I'm satisfied with the result.</p><p>And the final boxes (the request was about two units.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhzYufcQYHVhcmmAGj0HJFOpKl8af8Zn0WJe7VsVrsc8CwmR3lRm2UJ7FJo4gQX6JWvMbdgECvCniuFWax-8J7BJDOdb6L0TRTHphEexRE7Xs0DYQXLvNtYOGkIXH4bShsHiACIDKHWkXeyNsilo3PMxqwglFWtjCx-oCNXbQjqCfDJIKsDWFJ2C4JA/s4032/2023-06-11%2021.48.43.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhzYufcQYHVhcmmAGj0HJFOpKl8af8Zn0WJe7VsVrsc8CwmR3lRm2UJ7FJo4gQX6JWvMbdgECvCniuFWax-8J7BJDOdb6L0TRTHphEexRE7Xs0DYQXLvNtYOGkIXH4bShsHiACIDKHWkXeyNsilo3PMxqwglFWtjCx-oCNXbQjqCfDJIKsDWFJ2C4JA/w300-h400/2023-06-11%2021.48.43.jpg" width="300" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHAm56MV9dLD7jByIF65dsQTK9rc_-M2G28vBUFp1wjS_Xq2lr8lHp8Ldwaf7_-7r1c25K3P5VufCIphDRTPCF6hP9kL058W0RPDfrlqoyaxrvYZgyTPD0yHg4rinfA2Vv-odBfbRWgZFlMkgdgfZN30YtPZCl_cUceHI5VKFUu0TpfzCxSQDjXnAF/s4032/2023-06-11%2021.48.47.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHAm56MV9dLD7jByIF65dsQTK9rc_-M2G28vBUFp1wjS_Xq2lr8lHp8Ldwaf7_-7r1c25K3P5VufCIphDRTPCF6hP9kL058W0RPDfrlqoyaxrvYZgyTPD0yHg4rinfA2Vv-odBfbRWgZFlMkgdgfZN30YtPZCl_cUceHI5VKFUu0TpfzCxSQDjXnAF/w400-h300/2023-06-11%2021.48.47.jpg" width="400" /></a></div><br /><p>I put two resistance values into a single box. The only thing left is to print some labels on it with the values.</p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-29797575158496102392023-06-12T20:30:00.001+02:002023-06-12T20:45:00.775+02:00Spectrum Analyzer<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisu67hCpWxmqyJvryIr55JzadWlHAAYremFnkQ-qT3u6iAN_rNuE_i9B-D_gnOxzGIO97-3lukhMxtlGjQFlMMLNZz0YbYJkNFYZPzi8psxQGsm6EmgngmCL79sq_5xYPOW65rejitKWaOhnLmZpTbT0Fr23rDODIIMLKKHltx8puS6h-ak3RCjkri/s1500/SA.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="982" data-original-width="1500" height="261" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisu67hCpWxmqyJvryIr55JzadWlHAAYremFnkQ-qT3u6iAN_rNuE_i9B-D_gnOxzGIO97-3lukhMxtlGjQFlMMLNZz0YbYJkNFYZPzi8psxQGsm6EmgngmCL79sq_5xYPOW65rejitKWaOhnLmZpTbT0Fr23rDODIIMLKKHltx8puS6h-ak3RCjkri/w400-h261/SA.jpg" width="400" /></a></div><br /><div><br /></div>It is itching. Yes, you can tell: scratch it.<div>Actually I'm in a debate with myself. As I read more, more confused.</div><div>I need a Spectrum Analyzer. Or maybe not. Yes, I had an HP ESA, but sold it. It was a 75 ohm model with a frequency range doesn't go below 1Mhz, what is I felt is a no go for me. Yes you can tell that those things can be handled, but it is too late. It is gone, so look into the future.</div><div>What I need an SA for</div><div><ul style="text-align: left;"><li>Audio measurements. I need to cover let say from 10Hz to 100kHz. Yes, this is wider than the audio range, but it is good to know, what the electronics do outside it.</li><li>SMPS measurements. I'd like to characterize the noise of the things I buy or build, get EMI probes, etc. No, I don't need it for FCC or similar acceptance, just to know, what I bought it a quality unit, or a heap of crap. I guess the frequency range is from 20kHz to a few MHz. Also I intend to find out, the ideal frequency of unknown SMPS transformers. I guess later also need a tracking generator.</li><li>Characterize frequency references. Lately I was playing with rubidium standard, I have also a few OCXOs in my parts box, for later use. Intend to build a GPSDO or similar unit. Those things are running around 10MHz</li><li>Repair characterize maybe calibrate AM/FM generators. It happened to fall four Panasonic/Levar VP-8193A/D onto my bench. All of them has issues in the RF section (looks like the control part works perfectly, the LF part I didn't check yet). For repairing, later calibrating it. For those I need a frequency range from around 100kHz to around 200MHz. It also need analog modulation analysis for AM and FM.</li><li>Sub GHz and GHz digital communication. It is in my mind to play with 433kHz, 868kHz, ZigBee, Z-Wave, LoRa, Bluetooth and WI-Fi. The sub GHz can be handled by most of the analyzers but the 2.4GHz is a different story. Also those things are requiring some kind of Digital Modulation Analysis, what not all of the SA has.</li></ul><div>What test equipment or similar have I currently</div></div><div><ul style="text-align: left;"><li>Hack-RF SDR <a href="https://greatscottgadgets.com/hackrf/one/">https://greatscottgadgets.com/hackrf/one/</a>. It is by design is not a test equipment. I need to figure out, get some advise, if I can use it for any of the functions above. It maybe good as SA, AMA, DMA for the RF range, but has no idea what can be achieved with it or even good enough for measurements. Didn't use it up to know just have it in the drawer for a while.</li><li>Boonton 8201 Modulation Analyzer. Probably good for the AMA function (if it works, not yet tested)</li><li>Rigol MSO-5074 (with all of the options added, so it is a highly capable 4 Ch, 350MHz, 8Gsps oscilloscope). I think the FFT function can be good for some of the low frequency measurements, but I'm afraid of the ADCs 8bit resolution for this kind of sensitivity required work.</li><li>HP 35665A Dynamic Signal Analyzer. Probably good for most of the audio related work together with the other audio equipment I have</li><li>Steinberg UR22 mkII external sound card. Plan to use for audio. There are quite capable software available for free online, I also have a measurement microphone, power amplifier, Dayton DATS v2 to extend the capabilities of the computer based measurements.</li><li>HP 8903B Audio Analyzer. This is a highly capable unit, but unfortunately I can't count on it currently as it need repairs/calibration. The linearity in the frequency range is a way off even just connected its generator output, to its input</li><li>Keithley 2015 THD multimeter. It is able to commence some of the functions of the 8903B.</li></ul></div><div>What options I have</div><div>Actually I targeted the budget max €1500+VAT.</div><div><ol style="text-align: left;"><li>Doesn't buy anything just try to utilize my current equipment for the purpose above. It may work, but deffinetely need some advise, starting points for information.</li><li>TinySA Ultra. It is probably able to fulfill most of my RF needs. I just not yet know if it has drawbacks other than the small display. Some more research will be needed.<br /><a href="https://eleshop.eu/tinysa-ultra-spectrum-analyser.html">https://eleshop.eu/tinysa-ultra-spectrum-analyser.html</a></li><li>Owon XSA-1015P-TG. It seams to be a great unit. I checked this video: <br /><br /><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen="" class="BLOG_video_class" height="266" src="https://www.youtube.com/embed/z0HUtd8ErjU" width="320" youtube-src-id="z0HUtd8ErjU"></iframe></div><br />It looks like, on most of the parameters it is better than the Rigol (I was considering previously, but based on my research I dropped it already). For €975 it is a great deal <a href="https://eleshop.eu/owon-xsa1015-tg.html">https://eleshop.eu/owon-xsa1015-tg.html</a>.</li><li>Siglent SSA3021X-Plus. This is a similar unit as the previous Owon, but it cost a bit more €1469 <a href="https://eleshop.eu/siglent-ssa3021x-plus-spectrum-analyzer.html">https://eleshop.eu/siglent-ssa3021x-plus-spectrum-analyzer.html</a>.<br /><br /><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen="" class="BLOG_video_class" height="266" src="https://www.youtube.com/embed/gkLciTsjGZg" width="320" youtube-src-id="gkLciTsjGZg"></iframe><br /><br /></div>It has upgradability to 3.2GHz (covering the Wi-Fi and Bluetooth band), has AMA and DMA option. I didn't see any of those in the Owon specification.<br />But still, there are some things I miss in both of the units:<br /></li><ol><li>Not covering the audio band</li><li>The TG minimum frequency on both units starts at 100kHz, what is too high for testing SMPS parts.</li></ol><li>Signal Hound SA44B Spectrum Analyzer + TG44A Tracking Generator. Those units together are bit above the budget what I willing to spend ($1930 together) <a href="https://signalhound.com/products/4-4-ghz-scalar-network-analyzer/">https://signalhound.com/products/4-4-ghz-scalar-network-analyzer/</a><br />It looks like resolve my low frequency questions as it start at 10Hz (both the SA and TG).<br />I'm a bit afraid being solely PC based USB device, and not yet sure if all of the functions are available I'd like to have. Actually I found a review video on it.<br /><br /><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen="" class="BLOG_video_class" height="266" src="https://www.youtube.com/embed/9wYDpzf-sl8" width="320" youtube-src-id="9wYDpzf-sl8"></iframe><br /><br /><div style="text-align: left;">I not yet watched it as it is two hours long. I should find the time before I decide.</div></div></li></ol>So, here I stand today. Bit more confused than a few days ago, when I started to look.</div><div>If you have any ideas, thoughts on this, please let me know. I really would like to get some hints on this. </div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-61720163487480699892023-05-29T12:00:00.001+02:002023-05-29T12:13:13.895+02:00Keithley 2700 - Repair<p> I couldn't resist. Found this puppy faulty on the eBay.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFhXjJ-M9ABNZKqrsO48Qsz3JoUXCzi6AnMsQodiPaZISIvz8mzNL_PSagNYxBU97vj1HzAGm5ubswI-qv_XoeLXgV6vsguM-nntKYefUjvLYzd8A8TXVjFv-ALeNhM46cV7Lx0E06Tpy9yMy4M1hmxI-pHZMt7OlY8sFQ4xYdO5VGyMFh_LS5E0oQ/s4032/2023-05-28%2020.03.11.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFhXjJ-M9ABNZKqrsO48Qsz3JoUXCzi6AnMsQodiPaZISIvz8mzNL_PSagNYxBU97vj1HzAGm5ubswI-qv_XoeLXgV6vsguM-nntKYefUjvLYzd8A8TXVjFv-ALeNhM46cV7Lx0E06Tpy9yMy4M1hmxI-pHZMt7OlY8sFQ4xYdO5VGyMFh_LS5E0oQ/s320/2023-05-28%2020.03.11.jpg" width="320" /></a></div><br /><p>It doesn't turn on. Even consume zero current from the mains.</p><p>For a quick look: the fuse is intact. Tested the AC connections from the mains transformer. Nothing come out. Ok, so either the mains transformer or the mains connector module (connector, voltage selector, mains switch) faulty.</p><p>Checked the Mains connector module. Unfortunately the available service manual is useless. So with the mains module, done some reverse engineering.</p><p>Here is the transformer's connection:</p><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhPZs-BcVCJ7jbt_RqE1KR7jUBxFWrz6J3jbpxalpm8bGxIgvEpnqvN2SJajoThs8Gu7fI_d9ErWoGnY17Kn617F8xPPihqsfq0RNDxaaMw8aKrAvPjjNjZgQ0xDjlj6cbzf3ULRDl1z7w0UXJtLQP7bY4XqfJq4qmA4BYxv80k2Ho8BRZw0O0OCCCr" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="121" data-original-width="135" height="179" src="https://blogger.googleusercontent.com/img/a/AVvXsEhPZs-BcVCJ7jbt_RqE1KR7jUBxFWrz6J3jbpxalpm8bGxIgvEpnqvN2SJajoThs8Gu7fI_d9ErWoGnY17Kn617F8xPPihqsfq0RNDxaaMw8aKrAvPjjNjZgQ0xDjlj6cbzf3ULRDl1z7w0UXJtLQP7bY4XqfJq4qmA4BYxv80k2Ho8BRZw0O0OCCCr=w200-h179" width="200" /></a></div><br />Measuring the transformer I found out, that the 100V winding is demaged.<p></p><p>So, I connected the 100V - 220V cables (blue and gray) to my variac, and set the voltage to 120V.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLeD4SkNX1qttATxHkTUSqV84IRCay6BLfhQoWgkhz9E8D8ZX4vdT9RJGoVOV3GeI4CTNZMfrfpTt8bpb7XZ5pe4mvRPS6SrnUHa5aQp0EDcSBjM6RFOE5-dinrCFA673hQ-pMrnULYwcw7nPKRDzRiJwh_8X6TZ3sJWTIl6FYkOkWS22Te0izY-04/s4032/2023-05-29%2011.38.57.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLeD4SkNX1qttATxHkTUSqV84IRCay6BLfhQoWgkhz9E8D8ZX4vdT9RJGoVOV3GeI4CTNZMfrfpTt8bpb7XZ5pe4mvRPS6SrnUHa5aQp0EDcSBjM6RFOE5-dinrCFA673hQ-pMrnULYwcw7nPKRDzRiJwh_8X6TZ3sJWTIl6FYkOkWS22Te0izY-04/w300-h400/2023-05-29%2011.38.57.jpg" width="300" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnKbf-mXOLVCOwONLmESvXefpZv07lyyKGiZGzhGTFE8gRaUPaUxlqKWdOG7CZLqHAXHC9F-n1l9XS0If2CTcjiMlVyHUFUWSXlzYd5_l5cU8lTaoQJbbwwuHo41GGj-oh96X14rb7eZXQUKsuEH3ZfKcuCfKtroTH2y1-tyEzpqJDnZMEGnM-hJi9/s4032/2023-05-29%2011.38.54.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhnKbf-mXOLVCOwONLmESvXefpZv07lyyKGiZGzhGTFE8gRaUPaUxlqKWdOG7CZLqHAXHC9F-n1l9XS0If2CTcjiMlVyHUFUWSXlzYd5_l5cU8lTaoQJbbwwuHo41GGj-oh96X14rb7eZXQUKsuEH3ZfKcuCfKtroTH2y1-tyEzpqJDnZMEGnM-hJi9/w300-h400/2023-05-29%2011.38.54.jpg" width="300" /></a></div><p>Here are the results:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTy4yEUnrcsqDPsHRO-DZUwXEs8nczJf9O3sjoZxUyCadqTxBcw52DCURyrs_N_vAefa59lML4QvXHUn0UKmEM4s1Bkkagp_AC77465_Oyv-30ptmtX0Uu0yXmhr53dWnNE9z00uTuxmqorrqKSfsfulrmqof7NfKoLmqqRDEHmzzrtm4YOuQkOfLr/s4032/2023-05-29%2011.38.50.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTy4yEUnrcsqDPsHRO-DZUwXEs8nczJf9O3sjoZxUyCadqTxBcw52DCURyrs_N_vAefa59lML4QvXHUn0UKmEM4s1Bkkagp_AC77465_Oyv-30ptmtX0Uu0yXmhr53dWnNE9z00uTuxmqorrqKSfsfulrmqof7NfKoLmqqRDEHmzzrtm4YOuQkOfLr/w400-h300/2023-05-29%2011.38.50.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgt9hTtbpzpekVsQiGwIaZYnxsvMHrmlHq8sm-QheulQdnSsdkkjkc1hKaW8lZUuO4_u-E-CMdjW_8Bq8DGKkk1dmnQn9RIT2hX4EM2AsR2tEASWfxJ_pK1yoSLqxtCG_rKkiIFZymqolcZFpD3RsgH_e3iUase7yWAV2ycQsNilfmneaBGt6Hr6C4b/s4032/2023-05-29%2011.40.21.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgt9hTtbpzpekVsQiGwIaZYnxsvMHrmlHq8sm-QheulQdnSsdkkjkc1hKaW8lZUuO4_u-E-CMdjW_8Bq8DGKkk1dmnQn9RIT2hX4EM2AsR2tEASWfxJ_pK1yoSLqxtCG_rKkiIFZymqolcZFpD3RsgH_e3iUase7yWAV2ycQsNilfmneaBGt6Hr6C4b/w400-h300/2023-05-29%2011.40.21.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8veHnYLD2mYzkGMAJutA0TzKBkeADBAlDi0BXRf8k8SFNBZqCUvcLPK5418tUooWTy1OauP1EWsV9HPmIqUEg4bQoImtHKZEPgOyO_gfOmS56cC0W9siP2_-c0DFhDzcqbE5GLz-m8LhV7uB7aTcSiLvnFjkRo3su2sXJwyYF_mk3w4szXl9ydQqH/s4032/2023-05-29%2011.40.57.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8veHnYLD2mYzkGMAJutA0TzKBkeADBAlDi0BXRf8k8SFNBZqCUvcLPK5418tUooWTy1OauP1EWsV9HPmIqUEg4bQoImtHKZEPgOyO_gfOmS56cC0W9siP2_-c0DFhDzcqbE5GLz-m8LhV7uB7aTcSiLvnFjkRo3su2sXJwyYF_mk3w4szXl9ydQqH/w400-h300/2023-05-29%2011.40.57.jpg" width="400" /></a></div><br /><p>For the first sight, it looks like, it has no other issue than the faulty mains transformer. Now I need to find a replacement unit, or somebody, who is able to wind a new one for me.</p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-23735571869310949902023-05-22T16:00:00.001+02:002023-05-22T16:28:07.389+02:00Analog Multimeter 3. - PCBWay Review<p>My boards arrived Yesterday from PCBWay.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgW5cJlalMV3mj_Ix-WjrQb3H7amJs42Ek2XApazs9_nvmstHP6_sPsUsP2piHnKxK-76IJ0r8OnS-LJjQjt-dFO7ZsTWCyxPeKLfGET7IJec3QF2r6_8s5SqPGjfwb-iLHsnP3xro1RIkshAXduRomeFaUCEcE_LRNLFQRUBiPneFmalxrLVXoECaa/s4032/2023-05-15%2012.34.36.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgW5cJlalMV3mj_Ix-WjrQb3H7amJs42Ek2XApazs9_nvmstHP6_sPsUsP2piHnKxK-76IJ0r8OnS-LJjQjt-dFO7ZsTWCyxPeKLfGET7IJec3QF2r6_8s5SqPGjfwb-iLHsnP3xro1RIkshAXduRomeFaUCEcE_LRNLFQRUBiPneFmalxrLVXoECaa/w400-h300/2023-05-15%2012.34.36.jpg" width="400" /></a></div><p>As this is the first time I use them as board house I'd like to write a small review here.</p><p>I'm ordering PCBs from various manufacturers in the last 14 years. I started with some local manufactures. Those guys had horrible prices and not so good quality (anything above the single side board had additional cost, etc.)</p><p>10 years ago I changed to the board houses located in China. As my projects mostly has no time constraints, the long delivery time hadn't be an issue to me.</p><p>There were a certain PCB size what manufactured on the low cost ($5 + shipping). This started with 50x50mm, then become 70x70 and lately 100x100. Almost all of the manufacturers today provide 10pcs 100x100mm two sided, masked, silkscreen printed boards for 5$ + shipping.</p><p>This is where we stand today.</p><p>Lets check the order process of PCBWay. I had a simple 100x50mm board, for prototyping my SuperTracking regulator (based on Walt Jung/Jan Didden design).</p><p>It is a great thing to have a gerber viewer and automatic size calculator in your order process. Here the PCBWay site tricked me a bit. I didn't find this feature on the first sight. It is not reside on the main ordering page you see at first. You need to switch to the "Quick-order PCB" page to get this.</p><p>I absolutely love this feature:</p><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEghkK-rg3NK3Y4E4dIpwejhreUulaL7ixTU8C8o2GwcG3kwTBPnvJPA3tz8k8Jp8HNq4AM1MYTOUJA4Hms1utmtZ7WYlO8YVXrWJxXehac9hb9a2iXIPSDHGHRBhqxBgumcgUoRj772s4d_Aocg_B8Hl_ShGHV2siAwRx8AAYcPH3y7L8M-Volk_hwf" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="35" data-original-width="516" height="28" src="https://blogger.googleusercontent.com/img/a/AVvXsEghkK-rg3NK3Y4E4dIpwejhreUulaL7ixTU8C8o2GwcG3kwTBPnvJPA3tz8k8Jp8HNq4AM1MYTOUJA4Hms1utmtZ7WYlO8YVXrWJxXehac9hb9a2iXIPSDHGHRBhqxBgumcgUoRj772s4d_Aocg_B8Hl_ShGHV2siAwRx8AAYcPH3y7L8M-Volk_hwf=w400-h28" width="400" /></a></div>It means you order your PCB with HASL (tinned) finish and if you are lucky you get ENIG (gold plated) finish. To understand, the manufacturers put your hobby projects into the big orders process. If you tick this checkbox, you may get a gold finish. The manufacturer on the other side has greater flexibility where they put your order. This is an absolutely win-win situation.<p></p><p>We care about the environment. The EU doesn't allow lead based solders for a while in the consumer electronics devices. At the board houses, you can select between the leaded and the lead free finish. The manufacturers I seen previously charge extra for the lead free finish. This come from PCBWay with no additional cost.</p><p>If you ordered already PCBs, you always find a tiny order number on your board somewhere. In most of the cases this doesn't cause any problems. You have the paying option to remove this number. This is not always necessary. Check my previous design, what is the scale of the meter under design. There could be a problem to see this number on the visible area of the board. Here you can add special request written where you want to place this number. At other sites I seen a method, you can add a specially formatted text to your silkscreen where the manufacturer can put this number. I feel this point as room for improvement.</p><p>At PCBWay you pay your order after the review (in few hours - it took me a day, probably because I ordered my board during the weekend). Other manufacturers require the payment upfront. I think it is matter of taste. I prefer this method. It give me some time to review myself if everything is ok, I didn't make a mistake at the order (unfortunately paying upfront caused me trouble in the past).</p><p>One additional thing about the order process. Providing and stating to provide IOSS (Import One-Stop Shop) is a help for the EU customers from two point: the order arrive faster and you don't need to do the paperwork at the local customs or tax authorities.</p><p>The order of mine arrived on Monday.</p><p>The quality of the boards are excellent. Didn't find any issue with it. This is the quality I expect from the boards I want to use.</p><p>I was eager to populate it as soon it arrived. I was sure that all of the required components arrived. Jumped into the build. Immediately realized that three parts are missing.</p><p>One is the voltage reference I intend to use. It is my fault, forget to order it.</p><p>The other two is the dual OpAmp and the small NPN transistor. I got a message from Mouser: "Shipments of this product must be direct to an END CUSTOMER from an AUTHORIZED DISTRIBUTOR only. Your customer must order this product directly from Mouser or another authorized distributor."<br />Come on! I never sold components as a reseller. I'm just an engineer who time-to-time fix things, design equipment.</p><p>Contacted Mouser, It took around three days to settle this.</p><p>So yesterday finally ordered the remaining components. Waiting for the arrival.<br /><br /></p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-47139618688415771312023-05-10T12:00:00.001+02:002023-05-10T12:11:57.281+02:00VFD Mania 3. - Reverse engineering, filament supplyIn the last few years I collected many VFD tubes. In the last weeks, a bit cleaned it up, unsoldered a few to have just bare tubes.<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLz0ggh6NT9MPEpbnW-9eFDkg-dl8HAyqSOVna2HJVlM7HOxPstuDjtUX3Tg66Bc92pa63apkV9iF88izvzwNZbeUVpexvH_6Pm1rRCWYmNK83HcDG2xd1rTq1OCIyr5Jcr9froA8jxdnCE-icKWQwCMJzdJUIz4zzvDQUmMH86KPWcoti-ENL6wIo/s4032/2023-04-08%2006.38.54.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLz0ggh6NT9MPEpbnW-9eFDkg-dl8HAyqSOVna2HJVlM7HOxPstuDjtUX3Tg66Bc92pa63apkV9iF88izvzwNZbeUVpexvH_6Pm1rRCWYmNK83HcDG2xd1rTq1OCIyr5Jcr9froA8jxdnCE-icKWQwCMJzdJUIz4zzvDQUmMH86KPWcoti-ENL6wIo/w400-h300/2023-04-08%2006.38.54.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div>This is not all, but most of it what I currently have.</div><div>I wanted to make a catalog for myself with the pinouts. On the internet there is no common source of these. No datasheets, etc.</div><div>So the reverse engineering is required. For this I built a small, simple device (it took less than an hour from the idea).</div><div>For testing I need a 2.5V as a filament supply (may not the ideal solution, but good enough for testing), and something (12V good enough), for the anode and gate.</div><div>So, I built this:</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6hL5kiBcQDuz7byuXJ73-OTRE10NSauz7PwF489X0usiKh71Jt9ZpHAciGdHPQ9wQfsVvFHMHcausHluOyYvJ-kfyX6CEq--cZmu3GJP9gK0u4eqCJqOAJHw6rBiPQk558QU3hY86nqP8dAY0ClWW8slxAVvKprODvw7bAMACbL0ABovZ7DN6qjEO/s4032/2023-04-07%2017.42.16.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj6hL5kiBcQDuz7byuXJ73-OTRE10NSauz7PwF489X0usiKh71Jt9ZpHAciGdHPQ9wQfsVvFHMHcausHluOyYvJ-kfyX6CEq--cZmu3GJP9gK0u4eqCJqOAJHw6rBiPQk558QU3hY86nqP8dAY0ClWW8slxAVvKprODvw7bAMACbL0ABovZ7DN6qjEO/w400-h300/2023-04-07%2017.42.16.jpg" width="400" /></a></div><div><br /></div>The two blue banana can be connected to the filament pins, the two red sockets for the gate and anode. With this I can quickly find the segments.<div>Currently documenting it to a simple Excel sheet, but looking for a better solution, to able to publish it.</div><div>Finally took the time to test the previously designed/built filament supply.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhg2oMiguzUQoh4XE2cRKN_GwVqRW9voa3geigJe34zMeIlQ8wSRlSEVOhDqqsKIp4YTiKF_jZwAN23vnJjKgpU-VafpVakqbZS-98xo_dLqEzRw5yZOYZREEihRT7u0Vb3uH0LjLHRmjj0ISsgvXUeiImB6x6UVAB-WxeAAYxvBRJaeaBnxChxHywZ/s1727/Filament%20Supply.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="734" data-original-width="1727" height="170" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhg2oMiguzUQoh4XE2cRKN_GwVqRW9voa3geigJe34zMeIlQ8wSRlSEVOhDqqsKIp4YTiKF_jZwAN23vnJjKgpU-VafpVakqbZS-98xo_dLqEzRw5yZOYZREEihRT7u0Vb3uH0LjLHRmjj0ISsgvXUeiImB6x6UVAB-WxeAAYxvBRJaeaBnxChxHywZ/w400-h170/Filament%20Supply.jpg" width="400" /></a></div><br /><div><br /></div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEieyrvoBGDvl08pZM-UkeLN7tJ0TKHNqj_RP7LgFE-w6m8KghHqhKYpaBI07_iMWF7Y-lDXZ1eOcebnV_9ReyPFOJW6KVjq6qGZbVv0vsLL2N6Pc0t_ZHVMjhax38Y7f3MUcPwiKtevhoo6eYiF02sGpvTNDLvC6EZf8TEVL-5nRbA7zva-jFvtZF8f/s4032/2023-05-06%2022.10.20.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEieyrvoBGDvl08pZM-UkeLN7tJ0TKHNqj_RP7LgFE-w6m8KghHqhKYpaBI07_iMWF7Y-lDXZ1eOcebnV_9ReyPFOJW6KVjq6qGZbVv0vsLL2N6Pc0t_ZHVMjhax38Y7f3MUcPwiKtevhoo6eYiF02sGpvTNDLvC6EZf8TEVL-5nRbA7zva-jFvtZF8f/w400-h300/2023-05-06%2022.10.20.jpg" width="400" /></a></div><br /><div>It started to work immediately, but...</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhq1Tfl9d2tah3KMcxO-U38lCuuUK-Xvt7TInDMRhMWS67EOsIJ7oDL3wfAo7k7tbCubX0LLOLK8qMUcY0g12rli4lrfxryfkvlxRPm513V1bM05NToGVD2RoZV-8t9uTW9XHTA_-uS4UKJIdbwjDVm2oOTBHSuPTj-M7PRuXPeHxzszEHyVpGm_ukK/s1024/RigolDS5.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="630" data-original-width="1024" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhq1Tfl9d2tah3KMcxO-U38lCuuUK-Xvt7TInDMRhMWS67EOsIJ7oDL3wfAo7k7tbCubX0LLOLK8qMUcY0g12rli4lrfxryfkvlxRPm513V1bM05NToGVD2RoZV-8t9uTW9XHTA_-uS4UKJIdbwjDVm2oOTBHSuPTj-M7PRuXPeHxzszEHyVpGm_ukK/w400-h246/RigolDS5.png" width="400" /></a></div><br /><div>The waveform is horrible.</div><div>Superposed to the -27V supply is not much better:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDUcpRIbLnxFuONv7Qa-c7exNb-aJcAWVgkRJDWdWVofAJtLaZJKmf3AhiYTJ-KWcrfTEWhbNNZ-kR90ctA-cren8unK2eHrVf_Wm1BRZ0_2QjSmTIbNjjemTw-qmERwyH0JyZQ_Cb2U6zri0geyNobnjimmeSivUqzeefjNERTye2oooT0DMjxmlM/s1024/RigolDS7.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="630" data-original-width="1024" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDUcpRIbLnxFuONv7Qa-c7exNb-aJcAWVgkRJDWdWVofAJtLaZJKmf3AhiYTJ-KWcrfTEWhbNNZ-kR90ctA-cren8unK2eHrVf_Wm1BRZ0_2QjSmTIbNjjemTw-qmERwyH0JyZQ_Cb2U6zri0geyNobnjimmeSivUqzeefjNERTye2oooT0DMjxmlM/w400-h246/RigolDS7.png" width="400" /></a></div><br /><div>My first hint was instability at the last inverter (but it was highly unlikely). Testing, the previous circuit state generated this:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiczZ2dc-6cM9xK-Bee_iy9wOOxFrMVgONsoX8t4VXy9MUKhj2wLI7zFMvWS3aKCMNcmvHIE-zM-44ajZQ22phPYPQPgo2jw1HQRwIHjPaP51l091zaut8KvqTCJGDOXKs2yHDwCsAjSVfQTNToi8qdRD1W-Lt_TY3JXP_EVDzYrf5mxRIC2jzz1aA_/s1024/RigolDS10.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="630" data-original-width="1024" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiczZ2dc-6cM9xK-Bee_iy9wOOxFrMVgONsoX8t4VXy9MUKhj2wLI7zFMvWS3aKCMNcmvHIE-zM-44ajZQ22phPYPQPgo2jw1HQRwIHjPaP51l091zaut8KvqTCJGDOXKs2yHDwCsAjSVfQTNToi8qdRD1W-Lt_TY3JXP_EVDzYrf5mxRIC2jzz1aA_/w400-h246/RigolDS10.png" width="400" /></a></div><br /><div>I got a hint from a group (I would try it myself anyway), to check the supply voltage.</div><div>It looks like, the 20cm cable I used has too much resistance.</div><div>Adding a 1000uF capacitor to the input voltage of the module produced this:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTDOwHqoo28hzwXf3HA-1VDPEfoNATEq7Ys7Osq9uc7mpFpSYi4YJaKf4zz5dmhrK_itHiGB54rEeZxsKKdzHbUC-PD7sjxCAz70cXPB4IatCWrGwQ9MBb4mnLnM0VsVSn9qU0Wi_jbYN6aNYWWAOwQAvswPffBL0Yfp9pxI7n8oOmEOEdNsRBO-1F/s1024/RigolDS11.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="630" data-original-width="1024" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTDOwHqoo28hzwXf3HA-1VDPEfoNATEq7Ys7Osq9uc7mpFpSYi4YJaKf4zz5dmhrK_itHiGB54rEeZxsKKdzHbUC-PD7sjxCAz70cXPB4IatCWrGwQ9MBb4mnLnM0VsVSn9qU0Wi_jbYN6aNYWWAOwQAvswPffBL0Yfp9pxI7n8oOmEOEdNsRBO-1F/w400-h246/RigolDS11.png" width="400" /></a></div><br /><div>Still has some overshoot, but I think, I'll be able to handle this at the final design.</div><div>Next, I'll order the complete PCB for the Futaba 15MT67GNK and the Princeton controller IC.</div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-71899900093511170502023-05-08T21:50:00.001+02:002023-05-08T21:52:43.464+02:00Analog Multimeter 2.<p>Since the first post on my analog multimeter happened a few things.</p><p>I was thinking about the scale plate. If I order it as a PCB, why not to add some useful electronics to it. And I did. Adding a few LEDs will give a perfect backlight for the meter.</p><p>Also, I figured out, what to add to the back side. I've a few from this meter in the box with center zero configuration, so I added the same layout (with the LEDs) to the back side with center zero scale. Removed the "V" designator from the original design to add some versatility.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAZUFjmDiWKIN9Z0DbgSZWEbtXrxH7g2knZr7ESXfJ-rmdBHAMmyu2s4fqjmtoffOpas365M_SslkeyJ--FZq3WridOQ-H1WwYrhVoHfL8mcHQp0qLGYI87jHOGnJMmBUFoP5LePfXWuOweZtH0Rr7QnS6Ez1YBndobhQP-C20FcaKfaOV3p19XXw9/s2131/Scale%203D.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1289" data-original-width="2131" height="243" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiAZUFjmDiWKIN9Z0DbgSZWEbtXrxH7g2knZr7ESXfJ-rmdBHAMmyu2s4fqjmtoffOpas365M_SslkeyJ--FZq3WridOQ-H1WwYrhVoHfL8mcHQp0qLGYI87jHOGnJMmBUFoP5LePfXWuOweZtH0Rr7QnS6Ez1YBndobhQP-C20FcaKfaOV3p19XXw9/w400-h243/Scale%203D.JPG" width="400" /></a></div><br /><p>The back cover, with the mirror (3D printed insert + mirror foil) assembled:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi70T0yym4IirHWdgUgi5aOIPA-l4WKpU9w0_4N2hEin4l6XbAYRxh_TH2ogo2_y5yY0QFUeUPfaqJlgXlOMb1wEuEjJXGcIpkZEdKuOpso2wcKBtc8Ed2xVeohkqNl9zRz6LLeHuDeIA6MR9cI90QPkU4MgZZAcdV4NMr_IvsYi_DiUe1sgZ5lZHp5/s4032/2023-04-22%2017.08.21.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi70T0yym4IirHWdgUgi5aOIPA-l4WKpU9w0_4N2hEin4l6XbAYRxh_TH2ogo2_y5yY0QFUeUPfaqJlgXlOMb1wEuEjJXGcIpkZEdKuOpso2wcKBtc8Ed2xVeohkqNl9zRz6LLeHuDeIA6MR9cI90QPkU4MgZZAcdV4NMr_IvsYi_DiUe1sgZ5lZHp5/w400-h300/2023-04-22%2017.08.21.jpg" width="400" /></a></div><br /><p>Let there be light:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXozB1ySeYgxuTi3dZeNMsmg11FbAEEuVfh4I5dQezy7kEP5pnkMUMzEMlghWkcFzpB34McJI4srMSHy9pSjOisuJKfHalUKfAwTcxqr-qROCGH26D5FFSYPBZ6CFlO6fc_HeeEhl3aOEJuSri8310YbLiIcMmZDEcxx_B9ftjr3fq5RkOSSVg79hy/s4032/2023-04-22%2018.16.14.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhXozB1ySeYgxuTi3dZeNMsmg11FbAEEuVfh4I5dQezy7kEP5pnkMUMzEMlghWkcFzpB34McJI4srMSHy9pSjOisuJKfHalUKfAwTcxqr-qROCGH26D5FFSYPBZ6CFlO6fc_HeeEhl3aOEJuSri8310YbLiIcMmZDEcxx_B9ftjr3fq5RkOSSVg79hy/w400-h300/2023-04-22%2018.16.14.jpg" width="400" /></a></div><br /><p>The assembled panel meter (no, I will not keep this scratchy plexi cover in the final instrument):</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguWTSqOa__YPG_No6mrHPWGhWHb7c-RweEEiS0HtYYtL4tBFPMykbwlDmnE4Oqz9znM2Q4s49VY9EhRqy5MnNIXX-Wo1ZOihEgL8BGXjF7Ubi_2UPA8Cmi9e2RGqg4Jkle_z3D-MF37XC8cDrEQD9K9xSqMYGnGTdG6VdgsI3GRrZBa5aL6mFW6QRM/s4032/2023-04-22%2018.33.51.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguWTSqOa__YPG_No6mrHPWGhWHb7c-RweEEiS0HtYYtL4tBFPMykbwlDmnE4Oqz9znM2Q4s49VY9EhRqy5MnNIXX-Wo1ZOihEgL8BGXjF7Ubi_2UPA8Cmi9e2RGqg4Jkle_z3D-MF37XC8cDrEQD9K9xSqMYGnGTdG6VdgsI3GRrZBa5aL6mFW6QRM/w400-h300/2023-04-22%2018.33.51.jpg" width="400" /></a></div><br /><p>On the side, I started to work on the electronics. As it still far from ready, a few things are already settled. First of all the power supply voltages - Yes, you can tell it is too early, without the final design, but by my opinion, is a right time to try out some things.</p><p>What I already know about the analog section that I need a symmetrical, very low noise design, with the minimum achievable offset voltage - It is my assumption that the supply voltage is not really mater in a certain range, but the positive and the negative rail should match as much as possible.</p><p>So I "designed" an analog power supply. This first version is just to prove my concept, definitely not the final one. It will provide +-5V, roughly 1A. It is based on Walt Jung and Jan Didden's work called "SuperRegulator". Actually, I changed the reference to an MCP1502-25 from Microchip, changed the level shifting zener to LEDs (according to Walt Jung, it generate noise), and the negative side is not a separate regulator, but a tracking one. Also the Op Amps supply will be symmetric.</p><p>The design now is SMT except the power elements (two power transistors and two pre-regulators) also used a DIP socket for the Op Amp, to be able to try out different ones. My plan is OPA2180, but we will see, what is the best option.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheQ0VJWz0tt-NbrlUcnO56k2lr-gFWExfg4zmyEHF95G6gcIwCl76ZYa46jxroRcXEXYBgbSYMvZlsMdffQ-eBLJj5-0zL78ZM7gyZ0Fw41tZuRyucmSNlRb4ZWMkgmWSY2Ds-F4rfAJgEsmvO2E08Vnv-wDmA9wStGWtHvpK3U_0lrScJxDUAGzmb/s2506/PSU_Test_sch.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1253" data-original-width="2506" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheQ0VJWz0tt-NbrlUcnO56k2lr-gFWExfg4zmyEHF95G6gcIwCl76ZYa46jxroRcXEXYBgbSYMvZlsMdffQ-eBLJj5-0zL78ZM7gyZ0Fw41tZuRyucmSNlRb4ZWMkgmWSY2Ds-F4rfAJgEsmvO2E08Vnv-wDmA9wStGWtHvpK3U_0lrScJxDUAGzmb/w400-h200/PSU_Test_sch.JPG" width="400" /></a></div><div><br /></div>I also designed the board for it:<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4iwWrYcNhFIdh27whF7ZC-9c-bPd0bvrBRSwHIZHg7ieqRZLwtzE1-I0QbIbHtQf9vK2sLCuhb2e7EriszvTTB3n2zqlq0I3_h1zRIBtWWaG51Xd-fZw23dHUfEv0tMg_ErFw6Snz2-iqECo0B03WhwRu8rdtymXoPwLlwl1sbtgXn56GMQ-46JYk/s3838/PSU_Test_3D.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1984" data-original-width="3838" height="206" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4iwWrYcNhFIdh27whF7ZC-9c-bPd0bvrBRSwHIZHg7ieqRZLwtzE1-I0QbIbHtQf9vK2sLCuhb2e7EriszvTTB3n2zqlq0I3_h1zRIBtWWaG51Xd-fZw23dHUfEv0tMg_ErFw6Snz2-iqECo0B03WhwRu8rdtymXoPwLlwl1sbtgXn56GMQ-46JYk/w400-h206/PSU_Test_3D.jpg" width="400" /></a></div><br /><div>Roughly a week ago I got a message from PCBWay marketing, that they recognize my work, and intend to sponsor my efforts with the PCB manufacturing.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-tCKqfS8CZiWaLoytBZA7KIfvJe0tQmABAZBp90pr6JjJeYUDuXLksJBcUq6JLCK4RybK9brgx1Tdgvk3-t9uHPxLitASKVD8mshM7hmspJd7aTbcnZCw1HMsLOEtiPp9cu4Y9C7mJO4CMnG1n678xf3SWIcNYQVeqfAJFJk0dys4oS5E_a4vuJVV/s2842/pcbway-logo.webp" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2008" data-original-width="2842" height="283" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-tCKqfS8CZiWaLoytBZA7KIfvJe0tQmABAZBp90pr6JjJeYUDuXLksJBcUq6JLCK4RybK9brgx1Tdgvk3-t9uHPxLitASKVD8mshM7hmspJd7aTbcnZCw1HMsLOEtiPp9cu4Y9C7mJO4CMnG1n678xf3SWIcNYQVeqfAJFJk0dys4oS5E_a4vuJVV/w400-h283/pcbway-logo.webp" width="400" /></a></div><br /><div>This is an excellent news for me. This board is ordered from them. I eagerly waiting to arrive, and be able to review and also build this design. I'm looking forward to work with you guys.</div><div><br /></div><div>My planned design for this meter is full of Op Amps. There is an Op Amp competition running at Hackaday currently: <a href="https://hackaday.io/contest/190312-op-amp-challenge">https://hackaday.io/contest/190312-op-amp-challenge</a>.</div><div>I'm thinking about to enter with the part of this instrument.</div><div>Actually a circuit is "itching" in me for a while. This is a precision rectifier. Yes, you can tell, this is a well known, commonly used thing, but ...</div><div>Yes, that "but" is always there. I seen something as a patent entry from Microsoft (yes, this is funny, why Microsoft is trying to get a patent on an analog circuit), what, as it looks like not accepted.</div><div>This is what I feel a really good solution. I don't found drawbacks, but I'm really not qualified to judge this.</div><div>So, I started to design something based on that. Currently it is just a simulation, not using real components, it is just for functional proof.</div><div><br /></div><div>The circuit:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6CdUeJEXROpKS48d6pVQ1h_85ffWv6h2G-ltTX6B1sBifJWC3SCrrLPmA9GBNvM94WaOkoy-LVPN_zCUBu6-YDvGLzlwQkeQdd2-ehSvbag859YiO-kcB28PHGL7arztLkzt4fYlgQizGL51lUB_CgrmvuIgDf2TNJ9D9elHhvVW-MgGLMRPJ_X5e/s2561/PrecisionRectifier_Sym.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1401" data-original-width="2561" height="219" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6CdUeJEXROpKS48d6pVQ1h_85ffWv6h2G-ltTX6B1sBifJWC3SCrrLPmA9GBNvM94WaOkoy-LVPN_zCUBu6-YDvGLzlwQkeQdd2-ehSvbag859YiO-kcB28PHGL7arztLkzt4fYlgQizGL51lUB_CgrmvuIgDf2TNJ9D9elHhvVW-MgGLMRPJ_X5e/w400-h219/PrecisionRectifier_Sym.jpg" width="400" /></a></div><div><br /></div>It is based on an inverting and a non-inverting imput Op Amp (keeping constant input impedance, and creating inverted output also), a comparator, an analog switch and an output buffer.<br /><div>Here is the produced waveform:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQQIhT09a_e1WERy-_y9mAvmItiCATQv-JCzpimIML5F0eHMKyd6K6EfGD81CBcmLwbgrHV3OqRXwo7IqPBaLZHqBVDCtQLFOnicdLp9sJBB3OyzRVLTSpYS9ncilZcWiE4Bph-3RexNFKTTPhESj3-2tiO-ZeWZ7ILQ7LixIA1a9_r4aj2q8IP2aS/s2561/PrecisionRectifier_WaveForm.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1401" data-original-width="2561" height="219" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQQIhT09a_e1WERy-_y9mAvmItiCATQv-JCzpimIML5F0eHMKyd6K6EfGD81CBcmLwbgrHV3OqRXwo7IqPBaLZHqBVDCtQLFOnicdLp9sJBB3OyzRVLTSpYS9ncilZcWiE4Bph-3RexNFKTTPhESj3-2tiO-ZeWZ7ILQ7LixIA1a9_r4aj2q8IP2aS/w400-h219/PrecisionRectifier_WaveForm.jpg" width="400" /></a></div><br /><div>Don't forget, right know it is only theoretical, and low frequency. In the analog multimeter project I not even planning to use it for rectification, rather for automated polarity switching.</div><div>Next, I'll design the real circuit and PCB for not just test the functionality, but also the performance of it.</div><div>This is all for today. I'll continue (hopefully soon)</div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-41560820649119613992023-04-09T19:25:00.001+02:002023-04-09T19:30:10.634+02:00Rubidium frequency standard 1.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjshbxClKjUK0IfFgFoxZSocFM2jvYTDijWbqWxW6fCcdK_UCAvVq0TK9ULrn4AB0-fczm5kX7q2uAMYdOzv1xPV1iTX3Y9wpCc_9-QstxxnbqGGfO38cINgiOIEcHYoj0yZ8TXnSvovJh12y3HqmB4jc8cKUyVRs_pCGoRx1w4i6jD4FOXkrtvVFjZ/s1600/FE5680A.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1421" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjshbxClKjUK0IfFgFoxZSocFM2jvYTDijWbqWxW6fCcdK_UCAvVq0TK9ULrn4AB0-fczm5kX7q2uAMYdOzv1xPV1iTX3Y9wpCc_9-QstxxnbqGGfO38cINgiOIEcHYoj0yZ8TXnSvovJh12y3HqmB4jc8cKUyVRs_pCGoRx1w4i6jD4FOXkrtvVFjZ/s320/FE5680A.jpg" width="284" /></a></div><p>It took nine years, to pull this project out from the drawer:</p><p><a href="https://pakahuszar.blogspot.com/2014/03/project-idea-rubidium-frequency-standard.html">https://pakahuszar.blogspot.com/2014/03/project-idea-rubidium-frequency-standard.html</a></p><p>When I tested my HP 53131A and HP 53181A (already sold) frequency counters (also checked my oscilloscope and function generator), I realized, that all of the equipment a bit off in frequency (even the HP with its HS Oven).</p><p>I need some lab standard. As my lab is in a basement of a big building and the only access for the open sky is on the street side, where I can't put antenna, so I think the GPSDO is out of question. The other option would be a DCF-77 based solution (maybe based on this: <a href="https://www.qsl.net/dl4yhf/dcf77_osc/index.html">https://www.qsl.net/dl4yhf/dcf77_osc/index.html</a>), but it would take a while to experiment</p><p>So the best thing I can use is the FE-5680A rubidium standard, what I bought at the $50 era (now you can get it around $200).</p><p>I bought a Geppetto Electronics breakout board for it <a href="https://www.tindie.com/products/nsayer/fe-5680a-breakout-board/">https://www.tindie.com/products/nsayer/fe-5680a-breakout-board/</a>. Before try with it, I looked around and realized, that some of the FE-5680A modules on sale has internal 5V supply, and supplying it externally, may harmful for the unit.</p><p>So I just pick a DB-9 screw breakout for the first test.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjq5VtcbthPpVB5gJ2cjgpfTPx4nN80pjuXXKmsO01VZhUdAyuqjGwYkEPGs1aH9KKKC0iYk3jNbF8HvG72iz8BSReWKRga3Qh-BDxXmFOChrVNJYk-dPRADqWzz-7secCRbf49_3UuXYkfH_Sfey2HvfI5CP4gMYF8P8olqV0sxLPTWcPAutbJ600M/s4032/2023-04-08%2012.32.21.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjq5VtcbthPpVB5gJ2cjgpfTPx4nN80pjuXXKmsO01VZhUdAyuqjGwYkEPGs1aH9KKKC0iYk3jNbF8HvG72iz8BSReWKRga3Qh-BDxXmFOChrVNJYk-dPRADqWzz-7secCRbf49_3UuXYkfH_Sfey2HvfI5CP4gMYF8P8olqV0sxLPTWcPAutbJ600M/w400-h300/2023-04-08%2012.32.21.jpg" width="400" /></a></div><div><br /></div>It started without additional supply. I was able to get the lock signal, but nothing else.<div>I was able to identify:</div><div>Pin 1 - 15V</div><div>Pin 2 - GND</div><div>Pin 3 - Lock indicator</div><div>Pin 5 - GND</div><div>But nothing else. Most probably the narrow 1pps signal is present on the Pin 6, but wasn't able to get it for the first try (later, I'll retry it)</div><div>Looked around many sources. It look like it is an older model.</div><div>Found a few links. Somewhere in the documents were some information about Mathias Bopp's pdf file named: precise reference frequency rev 1_1.pdf</div><div>Actually I have the link, just the file is not downloadable from there. Here come handy, that I'm in the IT for a long while. Some digging in the Internet Archive resolved this.</div><div>It looks like, this document contains the most useful information about my specific unit. Probably other people will need it, so I republishing it here: <a href="https://www.dropbox.com/s/2xw59z9pkltaynz/precise%20reference%20frequency%20rev%201_1.pdf?dl=0" target="_blank">precise reference frequency rev 1_1.pdf</a></div><div>About this specific unit:</div><div>The Good:</div><div>It has the DDS board inside. Theoretically it can be programmed to any frequencies from 10Hz to 20MHz.</div><div>The Bad:</div><div>The RF signal is not present on the DB-9 connector, so modification needed. In addition the phase noise (jitter) of the DDS not as good as a VCO controlled OCXO could be. It could cause problems at high frequency usage.</div><div>The Ugly:</div><div>It is a facepalm situation when I first seen how some of the ham operators killed the other ways proper RF connector on the DDS board.</div><div><br /></div><div>One of my parts box I found an IPX - SMA pigtail cable. Tried it, and the IPX connector perfectly fit into the RF connector on the DDS board - Win 1!</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQ3j-CJQp1Zlicwi1OKwu7X9TuGadn6QefaKu5HMhF84sNS1quyuyauwem6li6-nL7ckUAQTYFTqo_5vZKIeFdB-EcAliM8ToYF3pKl6Iz6V7WEqiniJeU3FFphOcEZJB8wkZaJmEJ_71ehtm5rsFC56z43K1KeZ8rLR7wRZa0zkcqVoH-fM_iYvRo/s1967/IPX.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1118" data-original-width="1967" height="228" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQ3j-CJQp1Zlicwi1OKwu7X9TuGadn6QefaKu5HMhF84sNS1quyuyauwem6li6-nL7ckUAQTYFTqo_5vZKIeFdB-EcAliM8ToYF3pKl6Iz6V7WEqiniJeU3FFphOcEZJB8wkZaJmEJ_71ehtm5rsFC56z43K1KeZ8rLR7wRZa0zkcqVoH-fM_iYvRo/w400-h228/IPX.jpg" width="400" /></a></div><br /><div>As I'm still not an RF guy, don't have RF converters, cables, etc.</div><div>Found locally SMA - BNC adapters to run my first measurements with frequency counter and oscilloscope. I was able to pick it in one day. - Win 2!</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5n5Eu29_kR_hX4qwgbYQW7wy_s9VXAF346U0boQYtmqzSeUQai48uXEmfolXpmzYLpJh6oDreLmzupHbSDe_vc0q7v2rPDa2tjhGpATBR5MScun_h1PBjkdb4VhN4LCAXz0-8uRyvuLv8iHSkfHaPqSGutI8BvTxhMIfizxGiwG-m0WwsF0oj_9Sv/s4032/2023-04-07%2015.47.26.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5n5Eu29_kR_hX4qwgbYQW7wy_s9VXAF346U0boQYtmqzSeUQai48uXEmfolXpmzYLpJh6oDreLmzupHbSDe_vc0q7v2rPDa2tjhGpATBR5MScun_h1PBjkdb4VhN4LCAXz0-8uRyvuLv8iHSkfHaPqSGutI8BvTxhMIfizxGiwG-m0WwsF0oj_9Sv/w300-h400/2023-04-07%2015.47.26.jpg" width="300" /></a></div><br /><div>Ok, now connect everything together and measure.</div><div>Trying to screw the SMA adapter to the pigtail cable. Doesn't fit. What?</div><div>Then realized. Wasn't careful enough. I just took a quick look to the pigtail cables I have. Now checked more thoroughly. It is RPSMA and not SMA. Ouch.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKvQw0SQqfsCIKawEcnoP0gFII_sO_NX60G0Sv8D4ynQaLg6ESolrpw3mxLlKtXiY1CmDxItUzy1JOMj9mZA5eiqdawqYn-9HCObD61ehV0PX0ikclTIqM86hbQi8KuKJtDocBo20H3PFGmAkVWbmEccJEIhSmLVqj1DLgp4GII4pW5F3SDmuZfO95/s4032/2023-04-08%2012.31.27.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhKvQw0SQqfsCIKawEcnoP0gFII_sO_NX60G0Sv8D4ynQaLg6ESolrpw3mxLlKtXiY1CmDxItUzy1JOMj9mZA5eiqdawqYn-9HCObD61ehV0PX0ikclTIqM86hbQi8KuKJtDocBo20H3PFGmAkVWbmEccJEIhSmLVqj1DLgp4GII4pW5F3SDmuZfO95/w400-h300/2023-04-08%2012.31.27.jpg" width="400" /></a></div><br /><div>Anyway. Measure, to get some results:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6AgM8mPU2A84meDC9ed4WqJhb8Cn024_QQ3aRAUb3RNpLFxpy-pvuPJXQCadWtFqh5zqPo5snmrlh7aTHLkdq1i8rxDZglEY87f5AtBmKpcUuvaRy_45M3NiIxoYLaTNhCaZMjXVL8gKYFtrJsDuT1Xy-fKkeKXROHRHv9IyirBfau48Gn-iYQJ-v/s4032/2023-04-08%2012.27.44.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6AgM8mPU2A84meDC9ed4WqJhb8Cn024_QQ3aRAUb3RNpLFxpy-pvuPJXQCadWtFqh5zqPo5snmrlh7aTHLkdq1i8rxDZglEY87f5AtBmKpcUuvaRy_45M3NiIxoYLaTNhCaZMjXVL8gKYFtrJsDuT1Xy-fKkeKXROHRHv9IyirBfau48Gn-iYQJ-v/w400-h300/2023-04-08%2012.27.44.jpg" width="400" /></a></div><br /><div>Wow! It looks like my frequency counter is spot on. Showing 0.75Hz difference between the rubidium standard and the OCXO in the counter (from this, I can see that the standard is set to 2^23 Hz instead of the 10MHz) - Yes, probably I can get better results, when this unit is boxed, with the proper connectors and left switched on for a while.</div><div>Let see, how it looks like on my Rigol oscilloscope.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnpDBxXt0xEGVPUnrm6ILSMhBIBgFeWIBd4FDXlqt5Cz_cVVBGOa6jrKO7zXkjvryzgVEmZ891Oh8KYRgtFrEFcjqgfC-gViE4W_pENVQC3dHq7muA6Zh3SHhEFqInGKIxNoEBMrwouolzgLIkJ0TG2P4zPmzMMx4GOES0Vp_x385b5IoW8fdZvpJ_/s1024/RigolDS4.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="630" data-original-width="1024" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnpDBxXt0xEGVPUnrm6ILSMhBIBgFeWIBd4FDXlqt5Cz_cVVBGOa6jrKO7zXkjvryzgVEmZ891Oh8KYRgtFrEFcjqgfC-gViE4W_pENVQC3dHq7muA6Zh3SHhEFqInGKIxNoEBMrwouolzgLIkJ0TG2P4zPmzMMx4GOES0Vp_x385b5IoW8fdZvpJ_/w400-h246/RigolDS4.png" width="400" /></a></div><br /><div>It show 8.4210MHz. I definitely not happy with that. I'll try to figure out, how can I adjust it a bit.</div><div><div><br /></div><div>I stand here with this unit.</div><div>What is next:</div><div><ul style="text-align: left;"><li>Figure out the RX/TX connection and set it to 10MHz</li><li>Add a PSU and box the unit.</li><li>Do some performance measurements (actually I'll need an SA, what I don't have right now)</li></ul></div><div>Further plans/ideas (maybe or maybe not):</div><div><ul style="text-align: left;"><li>Lock an OCXO to the 1PPS signal to enhance the phase noise performance, if necessary</li><li>Create a user interface (MCU, probably VFD display, rotary encoder), to be able to change the output frequency. This most probably need the modifications described in the pdf above to get a better performance from the output filter.</li></ul></div><div><i>To be continued...</i></div></div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com1tag:blogger.com,1999:blog-125721937782888319.post-32985172427008096522023-03-24T20:50:00.002+01:002023-03-24T20:55:21.036+01:00New Arrival 11. - kind of...<p><strike>New</strike> Old arrival.</p><p>The things I picked up today are not new, not even for me.</p><p>A friend started a community lab a few years ago. I donated to him a bunch of test equipment. Actually I had a much smaller lab myself, and I over collected things.</p><p>Then came the COVID. This killed the the lab. </p><p>My friend finally gave up, repurposed the lab, for his own purposes.</p><p>Most of the equipment I gave, has not too much use for him. He felt, that it wouldn't be appropriate, to give away those things. So we agreed, that the equipment he doesn't need, or used come back to me.</p><p>Today I went to the lab, and picked those up.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhULM9IfoTHlwQBcp9AQtGqkVdO-DGZi7drxNc9_ySMt4uoHcpehye97pDrgcbkckAMbruuPGtTeuM7NPtghIVtP9-iVs1KPl9U5GQMll2QPBphAOKsEyqO7GtdWGLY1T9p4sPNlVcNyItjHsC1GqUOJfsEaNJQR2LmRE3QNDbzh9HNro-4teIvVlIS/s4032/2023-03-24%2019.25.03.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhULM9IfoTHlwQBcp9AQtGqkVdO-DGZi7drxNc9_ySMt4uoHcpehye97pDrgcbkckAMbruuPGtTeuM7NPtghIVtP9-iVs1KPl9U5GQMll2QPBphAOKsEyqO7GtdWGLY1T9p4sPNlVcNyItjHsC1GqUOJfsEaNJQR2LmRE3QNDbzh9HNro-4teIvVlIS/w400-h300/2023-03-24%2019.25.03.jpg" width="400" /></a></div><p>Bunch of FreeScale (now NXP) development boards, a CubieBoard, two BeagleBones, and a big Analog Devices Backfin development kit.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjoMpElvW5we_T9csBkc335R-mm07ejWDpO44kvu-R_cl5e7A_7gSuvycu5FNPj9zedwMvsH1Jbj8_O6tQRhKvcYWCiRFWHkMHuTxjUZNNqRSqVmkrxRm99XXVV3Xr9fSXWlMG9yajDLFMC6-EJ8y-ZNF74WCucrF7QM5OibLKgcf1VXnSY9LtzngW4/s4032/2023-03-24%2019.25.56.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjoMpElvW5we_T9csBkc335R-mm07ejWDpO44kvu-R_cl5e7A_7gSuvycu5FNPj9zedwMvsH1Jbj8_O6tQRhKvcYWCiRFWHkMHuTxjUZNNqRSqVmkrxRm99XXVV3Xr9fSXWlMG9yajDLFMC6-EJ8y-ZNF74WCucrF7QM5OibLKgcf1VXnSY9LtzngW4/w400-h300/2023-03-24%2019.25.56.jpg" width="400" /></a></div><p>Also some nice test equipment:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhLVaz0EJzkr8gAZLf1QQfuf8cZSBXLRmwIIhkr9_23-AqpscVrShRVveZ5w3XCgaejzxGRy5b1e6HOt3MwpyK5RV8uL5pUBozg0RQFXCpl5hW-K0rORR2CnZCA93C1PmKP-WqV7WapXEc_Kvn8j3QX8mePRc_0X7_OJJeBP6fniMD7a-fc7Fkb_Vt/s4032/2023-03-24%2019.34.42.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhLVaz0EJzkr8gAZLf1QQfuf8cZSBXLRmwIIhkr9_23-AqpscVrShRVveZ5w3XCgaejzxGRy5b1e6HOt3MwpyK5RV8uL5pUBozg0RQFXCpl5hW-K0rORR2CnZCA93C1PmKP-WqV7WapXEc_Kvn8j3QX8mePRc_0X7_OJJeBP6fniMD7a-fc7Fkb_Vt/w300-h400/2023-03-24%2019.34.42.jpg" width="300" /></a></div><p>Fluke 8500 multimeter, a Fluke/Philips PM3082 Oscilloscope (Even, I have a second one from this), a Tektronix 1240 and a 1241 logic analyzer.</p><p>For the logic analyzers I even have the original carrying case for the probes (with full of probes).</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaVKUBdUBsztn51XsB7PxR4F-g-6Ay_rBUOjI07VTWQr8CbARXyW3t2b35V34maHDy6xEis9hgusxZ-e3PwA1bRMHmruB0cE5tpAGMMcmc2gNl7LdQRygZR_pEY0mnh3SeDXU6z-TgfSD3Nq6jtdOM0Cf89eC4Rfb2ScgXnO1ilvazAis7jJUSNptS/s4032/2023-03-24%2019.35.04.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaVKUBdUBsztn51XsB7PxR4F-g-6Ay_rBUOjI07VTWQr8CbARXyW3t2b35V34maHDy6xEis9hgusxZ-e3PwA1bRMHmruB0cE5tpAGMMcmc2gNl7LdQRygZR_pEY0mnh3SeDXU6z-TgfSD3Nq6jtdOM0Cf89eC4Rfb2ScgXnO1ilvazAis7jJUSNptS/w300-h400/2023-03-24%2019.35.04.jpg" width="300" /></a></div><br /><p>My plan is to switch on, test, and sell most of the things above, as I barely need them (may keep, some of it, but this is not the main plan)</p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-46106821827630335182023-03-23T06:40:00.001+01:002023-03-23T06:45:52.807+01:00VU Tower<p>I have children (a boy and two girls).</p><p>I always have in mind to connect my hobbies to my family. It not always turns the way I'd like, but not this time. For precious moments time-to-time I make presents myself. Like the repurposed radio for my mother for Christmas.</p><p>During the last weekend was one of my daughter's 14th birthday. She is moving to party age soon. What would be better than something with lights connected to music.</p><p>This project is just a simple, floor standing VU meter, using a microphone board, Arduino Nano, and WS2812 LED strip. Quite a simple one.</p><p>I had issues with the microphone board. I bought all together 7 different kind. It would be a long story the troubles I had with those (so not writing it today). Finally I choose one from DFRobot. Mainly because the two 3mm mounting holes, what perfectly fit into my design.</p><p>I don't want to write to much about it, so the pictures.</p><p>The finished "product" (first, just because it looks better when sharing on social media. 😂)</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjv9Lu3B0u22RhuaPG0P95Glh43jfN-lNXNOk5LlDlc_QjNzZq02W-9Q7sOmnHT_DOBcwbQy3sX2iVkCynAujqDWJNXEqFuhwUwptN8zWcKGvAsjkMqbszIkMgAPZ5-4896DCde0JCIz_nOGv_tyh6EzfYilteJGlx4DrIqzNHT2Xkd7S_nfkydbmK7/s4032/2023-03-19%2011.14.08.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjv9Lu3B0u22RhuaPG0P95Glh43jfN-lNXNOk5LlDlc_QjNzZq02W-9Q7sOmnHT_DOBcwbQy3sX2iVkCynAujqDWJNXEqFuhwUwptN8zWcKGvAsjkMqbszIkMgAPZ5-4896DCde0JCIz_nOGv_tyh6EzfYilteJGlx4DrIqzNHT2Xkd7S_nfkydbmK7/w300-h400/2023-03-19%2011.14.08.jpg" width="300" /></a></div><div><br /></div>Bare electronics:<br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg49mnZMAMZQHfiYRBv8Gjn4KFluDWSB4hN8LO2IoTleai_9tEVKwvnITbEG-EM-3kPoaM2MXRRVJLIcMJE2D85z6tLDKmq5C8BmmYOiukS4ZzIlyUsKRPVwujiBHU9A-YV7keicT9xOFr5_L8s3mzmg-9s6vBJBSuOKQaPiL4zjR3rZaFVcGQca6-7/s4032/2023-03-19%2010.41.11.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg49mnZMAMZQHfiYRBv8Gjn4KFluDWSB4hN8LO2IoTleai_9tEVKwvnITbEG-EM-3kPoaM2MXRRVJLIcMJE2D85z6tLDKmq5C8BmmYOiukS4ZzIlyUsKRPVwujiBHU9A-YV7keicT9xOFr5_L8s3mzmg-9s6vBJBSuOKQaPiL4zjR3rZaFVcGQca6-7/w300-h400/2023-03-19%2010.41.11.jpg" width="300" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: left;">Assembled without the full enclosure:</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoCm6asLLdmBHFPQ4TrNPAC_wP3KOVO4_xx09a5YfjEIbVgC1kln95tJIqBcgo8OhGZrmv6sNCO7Rvxhr06b3r4BSs4ixe9AcwdDGKoz6_5nzr4pDC3kH9zXdIA703EFRoPL1psH5299DLkyj3vwS_s6mMRIGV66OiBGCfC09G0rtGJSsM0HIoMMrJ/s4032/2023-03-19%2010.57.17.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoCm6asLLdmBHFPQ4TrNPAC_wP3KOVO4_xx09a5YfjEIbVgC1kln95tJIqBcgo8OhGZrmv6sNCO7Rvxhr06b3r4BSs4ixe9AcwdDGKoz6_5nzr4pDC3kH9zXdIA703EFRoPL1psH5299DLkyj3vwS_s6mMRIGV66OiBGCfC09G0rtGJSsM0HIoMMrJ/w300-h400/2023-03-19%2010.57.17.jpg" width="300" /></a></div><p>How it is work (It is just her sisters yelling. I'm afraid, if I use some music on it, one of the YouTube's piracy dickheads ban it). It also has yellow and red, but unfortunately can't be seen on the video:</p><div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen="" class="BLOG_video_class" height="266" src="https://www.youtube.com/embed/PLYqOK0w28Y" width="320" youtube-src-id="PLYqOK0w28Y"></iframe></div><p>All of the elements (mainly code and the 3D design) can be found in this git repo. It also contains other VU meter related things, what is "work in progress" and not connected to this project:</p><p><a href="https://gitlab.com/suf/suf-electronics-vu-meter">https://gitlab.com/suf/suf-electronics-vu-meter</a></p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-13300922698798274912023-03-20T22:50:00.001+01:002023-03-20T22:52:32.427+01:00New Arrival 10. - Additions to my lab<p>There are many other things arrived since the last "new arrival" post, but today, I'd like to focus on the additions to my lab.</p><p><b>Agilent 53131A</b></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiL92-YzqsH5GEIMzMv7r6PYZnEkHqz0rf2gBVsj57ARDDNgM7GSsyXHDjYwsn8VRFJx_kpiiDxrCrU23a3XyvvP5jsKzInQ1oZAcYXETXsgyxUkT-1b7M0q_V_5i23DxCFqgvpQ1k7etmw395tU5iJXE4h3Y9abnvkydvLavSiGsW4NBBzMAdY7aM-/s4032/2023-03-20%2022.00.15.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiL92-YzqsH5GEIMzMv7r6PYZnEkHqz0rf2gBVsj57ARDDNgM7GSsyXHDjYwsn8VRFJx_kpiiDxrCrU23a3XyvvP5jsKzInQ1oZAcYXETXsgyxUkT-1b7M0q_V_5i23DxCFqgvpQ1k7etmw395tU5iJXE4h3Y9abnvkydvLavSiGsW4NBBzMAdY7aM-/w400-h300/2023-03-20%2022.00.15.jpg" width="400" /></a></div><p>Actually a few years ago I bought a 53181A Frequency Counter. Actually one of my former projects required a two channel counter, so it was itching in me, to get the bigger one.</p><p>For surprise my old 53181A had the high stability oven option. So now, I moved the OCXO reference to the new unit. I'll sell the 53181A finally (no, don't ask for the price, I've the buyer for it).</p><p>I finished the project were I think before, I need the analog multimeter, during the weekend - without it. Before that I scored this nice <b>Hioki FET multimeter</b>.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_XVu9brLIoDYIFCpiGr_FJ_tmVY654Ht2UiRBAGizSzFqV_25W5cUsoJPfQoZ3PEmUdEbZdweCkkWlwZO-4DR38bd3HZh0Qya4hmf78MPavEDM6Vkm27k44u2yEz251hd7Rfyp0Da4M938sbCbGwG_vC35vtwlVYX3V1LZc6hwiMfta8HMkLIriWw/s4032/2023-03-20%2012.35.45.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj_XVu9brLIoDYIFCpiGr_FJ_tmVY654Ht2UiRBAGizSzFqV_25W5cUsoJPfQoZ3PEmUdEbZdweCkkWlwZO-4DR38bd3HZh0Qya4hmf78MPavEDM6Vkm27k44u2yEz251hd7Rfyp0Da4M938sbCbGwG_vC35vtwlVYX3V1LZc6hwiMfta8HMkLIriWw/w300-h400/2023-03-20%2012.35.45.jpg" width="300" /></a></div><br /><p>I don't know, if or when will I need it, but for ~$40 is nice addition to my lab (actually building some bench unit is still in my focus)</p><p>I still have one half junk PM3082 oscilloscope lying around. I didn't give up to repair it. There is no picture on the CRT. My suspect is the high voltage supply. Playing with the 16500V rail is not a child play.</p><p>I scored this for nuts, to achive the task (when I have time for it):</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJTqOxwLM4XqZaXa1TsacTw6K3ziYsDDTbFQbSpS7UfOplN9Q3IWFc-_JT-m7BkvP-AeKv7sizt3QCwYdLDx2ZtbKeomieNQL7qAfLCe9s7ENHB5B2u93JdjJlrCx3O5aeWu7qpDPgMVLANYJ1UstjU-HlVdQkcHgjnNYFSCtdQpdS7A5kqJfZ5tJZ/s4032/2023-03-16%2009.34.13.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJTqOxwLM4XqZaXa1TsacTw6K3ziYsDDTbFQbSpS7UfOplN9Q3IWFc-_JT-m7BkvP-AeKv7sizt3QCwYdLDx2ZtbKeomieNQL7qAfLCe9s7ENHB5B2u93JdjJlrCx3O5aeWu7qpDPgMVLANYJ1UstjU-HlVdQkcHgjnNYFSCtdQpdS7A5kqJfZ5tJZ/w300-h400/2023-03-16%2009.34.13.jpg" width="300" /></a></div><br /><p><b>Fluke 80K-40 probe</b> in carrying case. Good for 40kV.</p><p>Two additional equipment. Those are not yet arrived. Those are somewhere at the currier services</p><p><b>Bruster Digistant 6405</b></p><p>Yes, I have already a similar unit, but for GBP60, I can't leave it there.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiS_Xh7Nruk5ZagFRgOom3KT4CEQ7L_bewvecVHkeuE4iI7HPDYt-c9WFIsABUYgELsHee7FuP5cEpCcwsToJOccM-Mf-LQViawFswqH-KIKNuzovvsoCkcXRUxx7Dty-gBZkZloEWZ6DCFt1Ot8NpWm8Pgul-UqeeADRCXsKdLU8Lq6phCZlQGGkxm/s695/s-l1600.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="467" data-original-width="695" height="269" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiS_Xh7Nruk5ZagFRgOom3KT4CEQ7L_bewvecVHkeuE4iI7HPDYt-c9WFIsABUYgELsHee7FuP5cEpCcwsToJOccM-Mf-LQViawFswqH-KIKNuzovvsoCkcXRUxx7Dty-gBZkZloEWZ6DCFt1Ot8NpWm8Pgul-UqeeADRCXsKdLU8Lq6phCZlQGGkxm/w400-h269/s-l1600.jpg" width="400" /></a></div><br /><p><b>Boonton 8201 Modulation Analyzer</b></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfF_1Nwp_nYyvaA2m13SnzxnQxiDZKe0936tW0eGDeEGpdqto7HbPN6tAF4x7VmfhmrTflO3sF-2ZajRc20OKI859F6DPPLA_GQq9OCUVoCFhI_8utVVwyB4uHpGyVqFvdZQuaBV6e7ku-yp0G-8d97nD_h2M5MaKG6j9oXP3IIjg6PS_YE20Z-qdU/s1600/Boonton.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfF_1Nwp_nYyvaA2m13SnzxnQxiDZKe0936tW0eGDeEGpdqto7HbPN6tAF4x7VmfhmrTflO3sF-2ZajRc20OKI859F6DPPLA_GQq9OCUVoCFhI_8utVVwyB4uHpGyVqFvdZQuaBV6e7ku-yp0G-8d97nD_h2M5MaKG6j9oXP3IIjg6PS_YE20Z-qdU/w400-h300/Boonton.jpg" width="400" /></a></div><div><br /></div>No, I will not become an RF guy. Actually I've four Panasonic/Leaver VP-8193 units. I want to test, repair them (and finally sell three of it).<div>I read through the service manual. I have most of the required or similar test equipment mentioned in the manual (Audio Analyzer, Oscilloscope, Low frequency spectrum analyzer, multimeters, etc.)</div><div>The only missing piece was the Modulation Analyzer/Measuring Receiver. The manual mention HP 8901A/B or 8902A. Those units are going for insane price on the eBay.</div><div>I was thinking to try to simulate the function with my HackRF SDR, but I think the result will be questionable, and probably need some programming, what is time.</div><div>I was so fortunate to score this unit for the third of the cheapest HP 8901A. I think this one has the same, or better function, and optically looks much better, than any HP unit I seen online.</div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-29184323103425840072023-03-08T21:45:00.002+01:002023-03-12T10:15:14.614+01:00Analog Multimeter 1.<p>I restarted to work with electronics around 15 years ago.</p><p>At the beginning I decided, not to use analog meters (except on audio amplifiers) anymore. Those are not precise, outdated, etc.</p><p>But the things are changing.</p><p>I started to working on a project, what done some weird things. I guess, with changing the load, the power voltage is dropping and disrupting the input measurement.</p><p>This is something, I will never see on a regular digital multimeter. I either can use some higher speed data acquisition and record the result on a graph, or use an analog multimeter and see the needle movement.</p><p>Actually I don't have none of the methods actively setup at my lab.</p><p>I decided to go to the easier way, and get an analog multimeter working. </p><p>I still have an old Russian meter from the soviet era, inherited from my grandfather (he were the person teaching me electronics, when I was six). This meter was lying on the ceiling, as I didn't use it.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhL9UvPKs4tP0BAOgElj90YYZE5RyNo1Kl7b67OiLYhHKEzCiIfvK6UQba6WNqt1rVRtwP6QVnoEoJ5rzt5zH6mWphxx_o6nScG44Gh0WXH_Mzij4B6vN53-QXyENBIwlMXHwbRWZOVp2Oxpia2sXEyhDmXcZoml7DrgpClaG4POrUIOlgbm4zBHPHB/s4032/2023-03-08%2008.03.12.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhL9UvPKs4tP0BAOgElj90YYZE5RyNo1Kl7b67OiLYhHKEzCiIfvK6UQba6WNqt1rVRtwP6QVnoEoJ5rzt5zH6mWphxx_o6nScG44Gh0WXH_Mzij4B6vN53-QXyENBIwlMXHwbRWZOVp2Oxpia2sXEyhDmXcZoml7DrgpClaG4POrUIOlgbm4zBHPHB/w300-h400/2023-03-08%2008.03.12.jpg" width="300" /></a></div><p>This meter wasn't switch on let say 30+ years.</p><p>This can be seen on the batteries left in it:</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheQvWFzncdneJsEpbh3LxzFFj8QEy9ngPxXlGrrggmMJE11bCs7EA1-YD1dgZXbBbVM5gLwQ66pbXNLM_AzVfmhAThfyeA44QAXGTrMVgqlnPRaJNEF8zNEA_IisyxoUtTG1-h7yK_a3hD5sO2PwhKuSq7NI1in9VQB2NPhNjEBaKul2DvOdhxWYxE/s4032/2023-03-08%2008.04.25.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheQvWFzncdneJsEpbh3LxzFFj8QEy9ngPxXlGrrggmMJE11bCs7EA1-YD1dgZXbBbVM5gLwQ66pbXNLM_AzVfmhAThfyeA44QAXGTrMVgqlnPRaJNEF8zNEA_IisyxoUtTG1-h7yK_a3hD5sO2PwhKuSq7NI1in9VQB2NPhNjEBaKul2DvOdhxWYxE/w300-h400/2023-03-08%2008.04.25.jpg" width="300" /></a></div><div><br /></div>At least, those doesn't cause to much damage. Just some minor corrosion.<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimcNJOAG32xVJg-UdYEYD8fHttiXpDucb7e8YUbI825A2AX9U_7DRm4VBBMUfr9Ciipg-xbZo4h8XBCyscM8QRc41B15ZKAxH6uVTk5wS_iY1_zDcqFjRsnsRr5pMxfo8fiMeh1ZuiQDuQ2_dEfXAdd1kmzhNkcZFT6GHqVmKXmNYjE5NQewNBnpdw/s4032/2023-03-08%2007.56.38.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEimcNJOAG32xVJg-UdYEYD8fHttiXpDucb7e8YUbI825A2AX9U_7DRm4VBBMUfr9Ciipg-xbZo4h8XBCyscM8QRc41B15ZKAxH6uVTk5wS_iY1_zDcqFjRsnsRr5pMxfo8fiMeh1ZuiQDuQ2_dEfXAdd1kmzhNkcZFT6GHqVmKXmNYjE5NQewNBnpdw/w300-h400/2023-03-08%2007.56.38.jpg" width="300" /></a></div><br /><div>Anyway. Those meters only use batteries for resistance measurement. For this, I'll definitely will use my digital meters. So no batteries going back to the case.</div><div>Opened it. Actually it had the original factory seal on one of the screws. It was never opened before.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgETk3myQhdUO1S4aovdfwkM6o_by4W8FvIcJeQv7MYxd8c1_6P7xaFvwyq4vCdbXTXFaKg-DM71uJTpcOOaooPkGUFg7L7kplLmmljllssKAvk9BAmta9BcTp4FZcEQjGbGQFDeKR69iwNlybDMq3bS0Ok8RxB2AxmHQWZNwdsdbMyaMCmHozc0OZW/s4032/2023-03-08%2007.55.00.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgETk3myQhdUO1S4aovdfwkM6o_by4W8FvIcJeQv7MYxd8c1_6P7xaFvwyq4vCdbXTXFaKg-DM71uJTpcOOaooPkGUFg7L7kplLmmljllssKAvk9BAmta9BcTp4FZcEQjGbGQFDeKR69iwNlybDMq3bS0Ok8RxB2AxmHQWZNwdsdbMyaMCmHozc0OZW/s320/2023-03-08%2007.55.00.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAwuWdZLB-ksl6ZXwTiX4S6JHpsXU1dfeZVuPfB7NwrWQ6oVlG1EOaxfP8xOkrLlAu68Ucip0c8kuPRJoqI4OxiP3E0yX_C_IaK6oNh2R_pLapztq8dceXgKkf1heYULZ2DjY2gYrGWBnP7CGqzeUk4WvPEYVqGAIwu2q-cEGhAHOhP41UvhKjii1D/s4032/2023-03-08%2007.55.19.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhAwuWdZLB-ksl6ZXwTiX4S6JHpsXU1dfeZVuPfB7NwrWQ6oVlG1EOaxfP8xOkrLlAu68Ucip0c8kuPRJoqI4OxiP3E0yX_C_IaK6oNh2R_pLapztq8dceXgKkf1heYULZ2DjY2gYrGWBnP7CGqzeUk4WvPEYVqGAIwu2q-cEGhAHOhP41UvhKjii1D/s320/2023-03-08%2007.55.19.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2yClkzsboKcjDqVRrcGLmhS2KZK01ZjgkUS6bgEto89_5gDD8-hVO4m4Lakkm2eLCq1plcomvqyucjj1G5PBz6pNt-0Nsi5qoDUxFLzk1rILO4QR1aSjj00J55aCTxZdGFBc2Z0FxkItzK7jdssMhFJHh6aNf457k0Jq8OwPkUGoow3SeqWgrNyg8/s4032/2023-03-08%2007.55.31.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2yClkzsboKcjDqVRrcGLmhS2KZK01ZjgkUS6bgEto89_5gDD8-hVO4m4Lakkm2eLCq1plcomvqyucjj1G5PBz6pNt-0Nsi5qoDUxFLzk1rILO4QR1aSjj00J55aCTxZdGFBc2Z0FxkItzK7jdssMhFJHh6aNf457k0Jq8OwPkUGoow3SeqWgrNyg8/s320/2023-03-08%2007.55.31.jpg" width="240" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1zRzeref1s2ofHjr_0Nwq7sL6O9w6tv_ys5cL-Rdu_Xaohug5-0SUBNnK9Sbq7mczeb2f52f_luq_3-1QahowluJf94Wa6p0GO9b19q-ubK1pxS7fqTz6Mf01s57IRBBGrIrrU0pG5mBLuQUpXj-nJmDwqsPPcZwuwsZBPif4oU0yV-krUJ3Xfn3d/s4032/2023-03-08%2008.00.00.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1zRzeref1s2ofHjr_0Nwq7sL6O9w6tv_ys5cL-Rdu_Xaohug5-0SUBNnK9Sbq7mczeb2f52f_luq_3-1QahowluJf94Wa6p0GO9b19q-ubK1pxS7fqTz6Mf01s57IRBBGrIrrU0pG5mBLuQUpXj-nJmDwqsPPcZwuwsZBPif4oU0yV-krUJ3Xfn3d/s320/2023-03-08%2008.00.00.jpg" width="240" /></a></div><br /><div>It is in perfect condition internally.</div><div>Tested. It is spot on. So I'll keep it for my measurements, where analog has advantages.</div><div>This could be the end of the story. But as usual, the little devil in my mind started to chase something.</div><div>I like much more the bench instruments than the handheld ones.</div><div>Looked around on the eBay. But didn't find any subject with reasonable price and condition.</div><div>What would be the result, if I design something, with the current component possibilities.</div><div>I have quite a few Ganz 101DA-2 panel meter. I bought a few as new, a few others on a ham market.</div><div>Based on those meters, I may can produce something interesting.</div><div>First, I started to work with one of the panel meters.</div><div>These things are by design has 100uA full range. The ones I bought has internal shunts to 5 or 20mA. First I wanted to remove those.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgsQMCw2X0rD0yXRapOf7cPoOogd_F4s6Dlh69eucTxr4-LSsFM-leXNSGSkJWQ3F9lGmR9Cbr7T0VLQB8XaR5fod1bNJ648w3bdaBnqd9Lvkf8hsxK2BvpQ7eVinxoZySJUnZBHiG3fy2HT7PlS0aGDM0Hq3QNMfE8kJ2ORL2BGXng0CDyPeQFio5G/s4032/2023-03-08%2008.09.36.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgsQMCw2X0rD0yXRapOf7cPoOogd_F4s6Dlh69eucTxr4-LSsFM-leXNSGSkJWQ3F9lGmR9Cbr7T0VLQB8XaR5fod1bNJ648w3bdaBnqd9Lvkf8hsxK2BvpQ7eVinxoZySJUnZBHiG3fy2HT7PlS0aGDM0Hq3QNMfE8kJ2ORL2BGXng0CDyPeQFio5G/w300-h400/2023-03-08%2008.09.36.jpg" width="300" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxYmupZ5C3qAQg2VCaUdXCESBTK-7gnKLkA-GbwvqPzqKqTnGirO84dmBTW98vgL4zHmxq_A86qHPTwAXsE1sP5PM1aLRCRalIZ_cbxLxuVJgS351BoYo2F-2Kdq0E64_G8HAJivSp83J4kFOo-8kWVgIkBG0jx22-h0Mcqkpwe7dc6Swn1kcPQNf6/s4032/2023-03-08%2008.15.21.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxYmupZ5C3qAQg2VCaUdXCESBTK-7gnKLkA-GbwvqPzqKqTnGirO84dmBTW98vgL4zHmxq_A86qHPTwAXsE1sP5PM1aLRCRalIZ_cbxLxuVJgS351BoYo2F-2Kdq0E64_G8HAJivSp83J4kFOo-8kWVgIkBG0jx22-h0Mcqkpwe7dc6Swn1kcPQNf6/w300-h400/2023-03-08%2008.15.21.jpg" width="300" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMm8TZSfxW_fknMg5JDEM4zFLSc9e9DtSCZ-4qgTm_zGASpECpai0zMDYkSWpbjm6QqeayatCJXhXBtMWG2C4kFbkPF6ljEXQCjWHOLWOGQBl6Dwr7LW45KcM1fob9QD6wtxsES_V1bn2iOe630ICt36AOYDamjj7rP_a3ANQouIhXq3Wkh_pqVXfk/s4032/2023-03-08%2008.15.28.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMm8TZSfxW_fknMg5JDEM4zFLSc9e9DtSCZ-4qgTm_zGASpECpai0zMDYkSWpbjm6QqeayatCJXhXBtMWG2C4kFbkPF6ljEXQCjWHOLWOGQBl6Dwr7LW45KcM1fob9QD6wtxsES_V1bn2iOe630ICt36AOYDamjj7rP_a3ANQouIhXq3Wkh_pqVXfk/w300-h400/2023-03-08%2008.15.28.jpg" width="300" /></a></div><br /><div>Last time I was playing with those units, I was a bit rude. Directly measured the resistance of the coil, what is definitely not a good idea (<a href="https://pakahuszar.blogspot.com/2022/09/analog-meter-resistor-sizing.html">https://pakahuszar.blogspot.com/2022/09/analog-meter-resistor-sizing.html</a>).</div><div>This time I was much more careful.</div><div>Used my Digistant voltage standard as source (it is not calibrated, and a bit off, but it is perfect for a very low voltage source), a current and a voltage meter.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYLrrCJaEdPO6gCcBvBPmBXPf6ZPN5pL6E9uZ_6z1MtMxR7UzYdoIEgC5b7dmYQphXzAFJg-XZiRSB9hqzzNhTMHZWVbKOTkiFbnLs5xjtM5PLharx1-cVU2DHnvxM541URXeO0PK4LmMuvE4ewrMhZS4Xl0fgNssP_xkrEJiDMkx1pZIvIwM6R4oG/s4032/2023-03-08%2019.24.46.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYLrrCJaEdPO6gCcBvBPmBXPf6ZPN5pL6E9uZ_6z1MtMxR7UzYdoIEgC5b7dmYQphXzAFJg-XZiRSB9hqzzNhTMHZWVbKOTkiFbnLs5xjtM5PLharx1-cVU2DHnvxM541URXeO0PK4LmMuvE4ewrMhZS4Xl0fgNssP_xkrEJiDMkx1pZIvIwM6R4oG/w300-h400/2023-03-08%2019.24.46.jpg" width="300" /></a></div><br /><div>So the result for the full scale is 95uA and 22.22mV. This means two things to me:</div><div>The coil resistance is ~234 ohm, and I can drive meter to full scale with let say 25mV. So I can play with these values.</div><div>With a good low noise FET input opamp, I may can go down to uV range while keeping high input impedance (thinking about 100Mohm).</div><div>We will see the results.</div><div>As you see the original scale plate is white, with just the start and the end marks. It is made from 0.9mm aluminum. I need a scale, but I have no equipment to make it from aluminum and paint is accordingly.</div><div>In addition, it would be nice to have a mirror scale (why not, if you can).</div><div>The original case, even have place for the mirror</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXONZnIFUqB9Ylx0m3gNiE5PetY9vK81uVlqDj2NeL2dcOIvIPZGk26Cg3_fRW4S8K7vWpA5mZ0pz7PyGxdHj9d-ABibBBPv8CwxMzS0oDP3J_5o_wXchQof9uRj9M6joM0P5-CUUEMa4NUL2_IU6N4eKTdwbJ3qD8P5fnjNoAAi_jcF4C73q6RaiH/s4032/2023-03-08%2008.17.09.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXONZnIFUqB9Ylx0m3gNiE5PetY9vK81uVlqDj2NeL2dcOIvIPZGk26Cg3_fRW4S8K7vWpA5mZ0pz7PyGxdHj9d-ABibBBPv8CwxMzS0oDP3J_5o_wXchQof9uRj9M6joM0P5-CUUEMa4NUL2_IU6N4eKTdwbJ3qD8P5fnjNoAAi_jcF4C73q6RaiH/w400-h300/2023-03-08%2008.17.09.jpg" width="400" /></a></div><br /><div>I was thinking to find a place, where somebody can cut the proper mirror to me with waterjet. Thinking it further, I decided, to design the mirror size, print it in 3D and use a self adhesive mirror foil on it.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9J0TUXimyjFGG1Vzx8WM9p17M1XY51awhlSk9mFeGNUqQUS3tgfi9enwPttVQQ5T3_nbeiSlydp9_YKmsSZ1Vkfm9MfoPaTkf0AAHUE4bl_jyJDTkRlgmvD2S4aB31oOQ8joez1LMRlU7x4R28_V6r2l0zJHHu0FZZ2QYkYfZRugi7CGibXYXvglZ/s1864/mirror_base.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1104" data-original-width="1864" height="238" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9J0TUXimyjFGG1Vzx8WM9p17M1XY51awhlSk9mFeGNUqQUS3tgfi9enwPttVQQ5T3_nbeiSlydp9_YKmsSZ1Vkfm9MfoPaTkf0AAHUE4bl_jyJDTkRlgmvD2S4aB31oOQ8joez1LMRlU7x4R28_V6r2l0zJHHu0FZZ2QYkYfZRugi7CGibXYXvglZ/w400-h238/mirror_base.png" width="400" /></a></div><br /><div>Next is the scale itself. I was thinking, how can I create the scale. First printing on paper and laminating it was my idea. But this is not the best for the mirror scale, as the cutout would not be easily achievable.</div><div>Then came the idea. What if I design it in KiCAD and send it to a board house for manufacturing.</div><div>So the design born. The scale was designed in OpenSCAD, exported to DXF and used by KiCAD.</div><div>Here is the result:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvgfpMBTh1JRk9_mklzLDXru367yjMqkc9dK0xaLq3MtyH08dF96UCvkufNOLCW1w_vSwZit1ScOIgjkugzvSfh32Xfnc2l19uO7WDLvkx9YA5bfCZcPM_c52wml5FyaRKzcoxrwO6Qd4x-Xv4w-azRsDCpiqAALWKaQ7fm5i0qr_pgpCzX9R4B2QD/s1722/Scale.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1171" data-original-width="1722" height="272" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjvgfpMBTh1JRk9_mklzLDXru367yjMqkc9dK0xaLq3MtyH08dF96UCvkufNOLCW1w_vSwZit1ScOIgjkugzvSfh32Xfnc2l19uO7WDLvkx9YA5bfCZcPM_c52wml5FyaRKzcoxrwO6Qd4x-Xv4w-azRsDCpiqAALWKaQ7fm5i0qr_pgpCzX9R4B2QD/w400-h272/Scale.jpg" width="400" /></a></div><br /><div>As the board house create minimum 5 pcs, I'd like to figure out, what design to put to the other side. Then I'll send to manufacturing.</div><div><br /></div><div>This is for now. I'll continue, as my build advance...</div><div><br /></div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-17540088262195120692023-02-26T11:40:00.001+01:002023-02-26T11:45:31.252+01:00VFD Mania 2. - Inverting boost converterFor the -27V supply I mentioned in the first part of the series (<a href="https://pakahuszar.blogspot.com/2023/02/vfd-mania-1-preface.html">https://pakahuszar.blogspot.com/2023/02/vfd-mania-1-preface.html</a>), I wanted to have something cheap, and from easily available parts.<div>Yes I know, that the MC34063 is old, not to effective, but still widely available, has calculator, tons of circuit configuration in the datasheet, and extremely cheap.</div><div>As I wanted to create -27V from the 5V supply (I want to run the module on the way, to have only a single supply input), I decided to have an additional external transistor, as even with 100mA output, the switching current on the internal transistor would be over 1.5A, what is the maximum of it.</div><div>The required circuit configuration is on the datasheet (choose the NPN external switch version), so I just used it in my design.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgq3CrjOfEtkEvQkTxgJxRsNea5trp2bUpS38hkPDrwO0mNtkMNu_6mgbGNu3_UcuHVAS44uaHNj-RtliMcIRU0aLT_P9xfLqHSRA545pv9_nbQ7aQL3qnZMt2kxRIr_qCy__p5OK3txcANoRQIX29xscFyy4WN2SRMdZ698W8hOaM4thlls7rq9zpB/s915/VEE%20Supply.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="724" data-original-width="915" height="316" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgq3CrjOfEtkEvQkTxgJxRsNea5trp2bUpS38hkPDrwO0mNtkMNu_6mgbGNu3_UcuHVAS44uaHNj-RtliMcIRU0aLT_P9xfLqHSRA545pv9_nbQ7aQL3qnZMt2kxRIr_qCy__p5OK3txcANoRQIX29xscFyy4WN2SRMdZ698W8hOaM4thlls7rq9zpB/w400-h316/VEE%20Supply.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHBHsD8JjcnoZtFkOdp7y6pn9AbQeZp9SugnsVqxnL7B-SDkTMBs_CS_890g4rrCgGpFtR3YfDCRpxRXd00HX8POgv8NlY2gr6dJn9o6xtgfW8BNdElSwLgkhYW-bTUq5eTzo08jhddrJBdURPepZb7-W6xTQ-FGwlT7pTM0ameI9kW5E97M3YShYC/s2207/VEE%20Supply%20PCB.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="952" data-original-width="2207" height="173" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHBHsD8JjcnoZtFkOdp7y6pn9AbQeZp9SugnsVqxnL7B-SDkTMBs_CS_890g4rrCgGpFtR3YfDCRpxRXd00HX8POgv8NlY2gr6dJn9o6xtgfW8BNdElSwLgkhYW-bTUq5eTzo08jhddrJBdURPepZb7-W6xTQ-FGwlT7pTM0ameI9kW5E97M3YShYC/w400-h173/VEE%20Supply%20PCB.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjl90XbuMTv26T4FJU93-fJD3MKinOfy2IzJIFSBLjwiqEaWlL1DLvN-OAKwLv6Z_8TLuIgX0N6oUVSGzZcM43cwUQPi5OzFdbSMyMB8-mvoHb7jzHTv-qzlqrMRwV1kF_sEwWW6morDoPnkiyeyAjY6jjq9ExaLRcMz2nutV7kL2lAe2yS2GU6eZ3_/s2558/VEE%20Supply%203D.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1287" data-original-width="2558" height="201" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjl90XbuMTv26T4FJU93-fJD3MKinOfy2IzJIFSBLjwiqEaWlL1DLvN-OAKwLv6Z_8TLuIgX0N6oUVSGzZcM43cwUQPi5OzFdbSMyMB8-mvoHb7jzHTv-qzlqrMRwV1kF_sEwWW6morDoPnkiyeyAjY6jjq9ExaLRcMz2nutV7kL2lAe2yS2GU6eZ3_/w400-h201/VEE%20Supply%203D.jpg" width="400" /></a></div><br /><div><br /></div><div>Ordered the panel, arrived, and built it.</div><div><br /></div><div>PIC</div><div><br /></div><div>On first switch on, no output, just some smoke. 😕</div><div>It happened, let say 6 month ago. I put the whole project aside as I had many more things to do.</div><div><br /></div><div>A few days ago it started "itching", to do something with it.</div><div>Actually, I looked for other possible solutions than the MC34063 (found some, but the component availability is still an issue)</div><div>Then I revisited the datasheet, and the original schematic, to figure out, what is the problem.</div><div>Redrawn it a bit different form, and realized something.</div><div>The R4 in the schematic above (according to my understanding) has the role, to switch of the transistor, compensate the base capacitance (it is low, but still exists). Then I realized, it will not fulfill its role. When the inductor voltage fall below -0.6-0.7V, it switch the transistor back on. The R4 should be between the base and emitter instead of the base and the ground if even needed.</div><div>I just removed it, and the circuit started to work perfectly.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgu-OVZHV3rHvIqvs4kstBOkqBul8220b-bfLhfykXkmhwphZSJX2e-Jftce4IeJT3yqo7mrqzNUMI_JFgMvEtoWSDsMTTNt3qDJVLlwjFhawC9EwgacVpucw7I0ORFNwrGkpOFMyJwATZDA1GwLMBp3G9hxx5RSRbi30DSuo4ZFHP-9vwcsm_YsL-I/s4032/2023-02-25%2020.02.01.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgu-OVZHV3rHvIqvs4kstBOkqBul8220b-bfLhfykXkmhwphZSJX2e-Jftce4IeJT3yqo7mrqzNUMI_JFgMvEtoWSDsMTTNt3qDJVLlwjFhawC9EwgacVpucw7I0ORFNwrGkpOFMyJwATZDA1GwLMBp3G9hxx5RSRbi30DSuo4ZFHP-9vwcsm_YsL-I/w400-h300/2023-02-25%2020.02.01.jpg" width="400" /></a></div><div><br /></div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfD1U6LSWrmkedsy_TbmmVVz8zjRCMT3fJG20x3S2cESGFBdC8cvqvkGdluPceEy94Y_fz_B_P3snCNa3-9vTtXhn7SCXInLa30L_qlfwtLdIWr1-dMnYSwkfmh-QpObD4Om0NK2yQxHYzd9Ax8v3DgxgoFM1K8m4DTVUJwiGw4N8bGn2MZ46jNVjQ/s4032/2023-02-25%2020.01.54.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfD1U6LSWrmkedsy_TbmmVVz8zjRCMT3fJG20x3S2cESGFBdC8cvqvkGdluPceEy94Y_fz_B_P3snCNa3-9vTtXhn7SCXInLa30L_qlfwtLdIWr1-dMnYSwkfmh-QpObD4Om0NK2yQxHYzd9Ax8v3DgxgoFM1K8m4DTVUJwiGw4N8bGn2MZ46jNVjQ/w400-h300/2023-02-25%2020.01.54.jpg" width="400" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: left;">It draw ~200mA from the 5V supply without load. Not good, but acceptable:</div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8z_BaOe4zrj8L0MRgnmoOqhfofzPr8UPyCgINX8O8HfeV4QZQbNEMwBuaTJG_V2WXzVSjps1rpu0Xa0uf1ayyYM25uNIV1dc1pVYOSbu5A7tCNE2gj3ZyINaAbI967fJ3jnq3YPJ3YlXBIZjd1E6k4fBvZyYQNGDjlc3AbIV7uay2vDBGAWRt-YPQ/s4032/2023-02-25%2020.01.40.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8z_BaOe4zrj8L0MRgnmoOqhfofzPr8UPyCgINX8O8HfeV4QZQbNEMwBuaTJG_V2WXzVSjps1rpu0Xa0uf1ayyYM25uNIV1dc1pVYOSbu5A7tCNE2gj3ZyINaAbI967fJ3jnq3YPJ3YlXBIZjd1E6k4fBvZyYQNGDjlc3AbIV7uay2vDBGAWRt-YPQ/s320/2023-02-25%2020.01.40.jpg" width="320" /></a></div><br /><div>Checked, in the datasheet, if I was the idiot, when designed it.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMWz6sc_ZKYBQi8HWTlfTYL3imTl8zzhO1S7TJVhQdt17DnBq3hxgYtWpfWXkh10L71ZPN3D94KzoqpKcTM_GgoqjviGF9Ts1hjwk5QrlkSGk0z8Y8AKA2KgHkBv1EBmk8Qr3SUBmd9hkPDlwcBdOEjTOp0fgUiXETPKXtKfoOKkIwv-7h0qOHht1C/s1870/MC34063_Inverter.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="882" data-original-width="1870" height="189" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMWz6sc_ZKYBQi8HWTlfTYL3imTl8zzhO1S7TJVhQdt17DnBq3hxgYtWpfWXkh10L71ZPN3D94KzoqpKcTM_GgoqjviGF9Ts1hjwk5QrlkSGk0z8Y8AKA2KgHkBv1EBmk8Qr3SUBmd9hkPDlwcBdOEjTOp0fgUiXETPKXtKfoOKkIwv-7h0qOHht1C/w400-h189/MC34063_Inverter.jpg" width="400" /></a></div><div><br /></div>It looks like not. The design flaw is coming from the datasheet.<div><br /></div><div>Finally, I wanted to see the supply noise. I seen some weird waveforms, at ~22.5kHz, what is not the expected switching frequency. (First real use of my shiny new Rigol MSO5074 oscilloscope)</div><div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-TmcIUab4Du-pOwjf9ohNKbUjiRkxu7ki2bzp6RRbDbMVZHTSXNCFOu0V00B59Ur43o-tZnnK4gFHM480RC-W-QIBL2KYbS6Th7ywQGcWY5G3dlWewOqXdkfeeuCvQ43Yu2EY2_igwjjZqpquJ0AoFkV5_srXBu2qrqcp-aXKGQvHynEQ1EuR-Od7/s1024/RigolDS2.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="630" data-original-width="1024" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj-TmcIUab4Du-pOwjf9ohNKbUjiRkxu7ki2bzp6RRbDbMVZHTSXNCFOu0V00B59Ur43o-tZnnK4gFHM480RC-W-QIBL2KYbS6Th7ywQGcWY5G3dlWewOqXdkfeeuCvQ43Yu2EY2_igwjjZqpquJ0AoFkV5_srXBu2qrqcp-aXKGQvHynEQ1EuR-Od7/w400-h246/RigolDS2.png" width="400" /></a></div><br /><div>Then it pop into my mind, what is the input the supply gets.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6LBoMy15Uo74qWiBeMdIuo2JfBe27xtiEHU6U1wr87KnbypX4mbL1n9ImxTx72lHW7ubRlFswgZ1TfjrLxRVGwiN4T_MfEfqO2IIWRnxBJEGPF-5nZbtodlanfc70XnkY4MNXXyhzpA7pWS6ujG3LiFwyhTY-Z4cnXy10E4Sq0SYi8AvMlrOt_IzY/s1024/RigolDS3.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="630" data-original-width="1024" height="246" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg6LBoMy15Uo74qWiBeMdIuo2JfBe27xtiEHU6U1wr87KnbypX4mbL1n9ImxTx72lHW7ubRlFswgZ1TfjrLxRVGwiN4T_MfEfqO2IIWRnxBJEGPF-5nZbtodlanfc70XnkY4MNXXyhzpA7pWS6ujG3LiFwyhTY-Z4cnXy10E4Sq0SYi8AvMlrOt_IzY/w400-h246/RigolDS3.png" width="400" /></a></div><br /><div>Oh, my! The yellow is the output of the newly built converter, the blue is the output of the used Axiomet bench PSU. Ok, I realized, why to use linear bench PSU (or maybe a good trusted switching one) when it come to noise measurement.</div><div>I'm planning to do that measurement later on.</div><div><br /></div><div>Next part is planned on the filament supply.</div><div><i><br /></i></div><div><i>To be continue...</i></div><div><br /></div><div><br /></div><div><br /></div></div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-32061250108916179802023-02-26T10:25:00.001+01:002023-02-26T10:27:48.475+01:00VFD Mania 1. - Preface<p>I'm kind of maniac, if it comes to the VFD displays. I've several instruments in my lab with VFD.</p><p>Even I collected many various versions with the thought, once I'll build something from it. Actually my first acquisitions were VFD modules, what already have all of the power supplies, so I not need to know, how to power, how to drive them.</p><p>On the other side, I always wanted to know, how VFD displays are working, how they need to be driven.</p><p>This story begins 8 month ago, just the half written article was put asside.</p><p>Then I seen this nice bare VFD so cheep, I couldn't resist. Bought them and my learning journey begins.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglfrPlNRDAV5nrSz8-k2ni6e4qqMC6YuEcuX6H2ixgEf_1w_rnaFjigAQsAmDsGvCAXN6ZJ3wL-RcJ4aWkCOV1kuOWFVjK8RVgHsQ8N3MRR5fVDbdABaICas1oigmFr0RtZaW_ssnXNFYnkCY3YzRk8UohSTW-OuluREHVVU3ZWwDhyPCHA0o_m6BS/s4000/VFD_Breadboard.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1957" data-original-width="4000" height="157" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglfrPlNRDAV5nrSz8-k2ni6e4qqMC6YuEcuX6H2ixgEf_1w_rnaFjigAQsAmDsGvCAXN6ZJ3wL-RcJ4aWkCOV1kuOWFVjK8RVgHsQ8N3MRR5fVDbdABaICas1oigmFr0RtZaW_ssnXNFYnkCY3YzRk8UohSTW-OuluREHVVU3ZWwDhyPCHA0o_m6BS/s320/VFD_Breadboard.JPG" width="320" /></a></div><div><br /></div>Now, I already know, it works like the vacuum tube.<div>It needs some heating voltage for the cathode, need anode voltage, and it have a grid to control the electron flow from the cathode to the anode.</div><div>In addition it has direct heating, so the cathode and the heating connected together (here it called filament supply). It is somewhere around 2.5V and recommended to use AC voltage (few 10th of kHz) to achieve even light distribution from one end to the other (the heater strings are connected to the two end of the VFD tube). For the anode/grid you need a voltage around 30V (it can change from tube to tube). With this one I was fortunate to figure out the original equipment this VFD was installed, got a service manual. It looks like it needed 32V.</div><div>On the side of the power supplies I need some IC, designed for driving VFD.</div><div>I choose PT6324 from Princeton Technology.</div><div>It is cheap and easily available from the eBay. Also it able to drive all of the segments of this display.</div><div>There is not uncommon, but for first sight it could be felt weird, that the IC need high negative supply voltage instead of positive. So in my case it need 5V logic supply, -27V VFD supply and a 2.5V AC filament supply superimposed to the -27V supply.</div><div>I actually designed the whole module...<br /><p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYbwjRAdvvyjGe7KhIIMxC46ZlObKhrokdQwOJQhU1BI7LMTTRB6nOPO9Bg-nPZJM0pI2j_dwbBFbjTWYXCMfMWgAWHTRyfY-q5xHDbqGMb6ICeAWs6MM9PyZDJLh-_zuwJ1Gs5EH1uARsJPVkRqZa8HsbybUVzdvdMKvBmlqHQoNp2mYGhMx2JSct/s2217/15MT67GNK_v1.1_pcb.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="572" data-original-width="2217" height="104" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYbwjRAdvvyjGe7KhIIMxC46ZlObKhrokdQwOJQhU1BI7LMTTRB6nOPO9Bg-nPZJM0pI2j_dwbBFbjTWYXCMfMWgAWHTRyfY-q5xHDbqGMb6ICeAWs6MM9PyZDJLh-_zuwJ1Gs5EH1uARsJPVkRqZa8HsbybUVzdvdMKvBmlqHQoNp2mYGhMx2JSct/w400-h104/15MT67GNK_v1.1_pcb.jpg" width="400" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikaxN9TLjzjQ6KOlsUKGKfnfQYY4yfCbn2QfbgwlaI3EcgEKf9tKVrrFfFR8IN21KFQIQF1bLplpyV1nH7lqBJ4f9NVnafmWwusBfsKtcPKs2PdhpJ4dh29cqdIQqbHURUb_VEtqOjZ9QXc9CKB37ClfO7qegoeJZmIpyAu9ae8u2cJAzVK5Cco4EQ/s2558/15MT67GNK_v1.1_front.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1287" data-original-width="2558" height="201" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikaxN9TLjzjQ6KOlsUKGKfnfQYY4yfCbn2QfbgwlaI3EcgEKf9tKVrrFfFR8IN21KFQIQF1bLplpyV1nH7lqBJ4f9NVnafmWwusBfsKtcPKs2PdhpJ4dh29cqdIQqbHURUb_VEtqOjZ9QXc9CKB37ClfO7qegoeJZmIpyAu9ae8u2cJAzVK5Cco4EQ/w400-h201/15MT67GNK_v1.1_front.jpg" width="400" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLJ2PmuV6r_NVtSPmtiPZrtUcf-ihKMb4Ujryeww5epJq3M24KSv0StMqL3rn9emilWwBlBRNpKPo7Ysvn6jBFQ4XmepWDpiEYY4ncHDMjTUTl3E1ypiDeE0TgqRU3_4YTZ6xF1VdWypdXbnjyMD7A-qv1sfFe2UvtocEtxlEwZvF8_uLJ9YF37XXX/s2558/15MT67GNK_v1.1_back.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1287" data-original-width="2558" height="201" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiLJ2PmuV6r_NVtSPmtiPZrtUcf-ihKMb4Ujryeww5epJq3M24KSv0StMqL3rn9emilWwBlBRNpKPo7Ysvn6jBFQ4XmepWDpiEYY4ncHDMjTUTl3E1ypiDeE0TgqRU3_4YTZ6xF1VdWypdXbnjyMD7A-qv1sfFe2UvtocEtxlEwZvF8_uLJ9YF37XXX/w400-h201/15MT67GNK_v1.1_back.jpg" width="400" /></a></div><p>...but I had a feeling, I may did something wrong, so I broke the design into pieces, ordered the power supply boards separately, so I can test it, before send the whole module to manufacturing.</p><p>The git repo of the design is here:</p><p> <a href="https://gitlab.com/suf/suf-electronics-vfd-futaba-15mt67gnk">https://gitlab.com/suf/suf-electronics-vfd-futaba-15mt67gnk</a></p><p><i>To be continue..</i></p></div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-78614988389663347692023-01-16T12:20:00.001+01:002023-01-16T12:21:07.229+01:00New Arrival 9.2023.01.05: It is kind of funny (or annoying you can judge).<div>My resin printer was ordered at the beginning of December in one single order.</div><div>Before Christmas arrived:</div><div>Shipment 1. - The printer itself</div><div>Shipment 2. - The wash & cure machine</div><div>Shipment 3. - 1l resin + air pure units</div><div>Yesterday arrived one single extra wash container (Shipment 4.). And still things are remaining. I don't know, how much this cost to AnyCubic.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjhDa4-Ls0Tlbc-C-Zq3nKZFxv_gjHKPg_pvy28Hy6r8SoncEQ7nJEYYTIeoGlhWgmnt2Pnz2dcvrTkQtoKgqOp__aOa-Woj_-oNQiCsQbzYsu95phzRXSnzKAmzJBf6CY5MiWGn23V3QTtxz2V3J4YdsVrK462FLstzaaaJt6KcCQ2zR9GOrCy64Ol/s4032/2023-01-06%2008.41.52.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjhDa4-Ls0Tlbc-C-Zq3nKZFxv_gjHKPg_pvy28Hy6r8SoncEQ7nJEYYTIeoGlhWgmnt2Pnz2dcvrTkQtoKgqOp__aOa-Woj_-oNQiCsQbzYsu95phzRXSnzKAmzJBf6CY5MiWGn23V3QTtxz2V3J4YdsVrK462FLstzaaaJt6KcCQ2zR9GOrCy64Ol/w300-h400/2023-01-06%2008.41.52.jpg" width="300" /></a></div><br /><div>2023.01.06: I was working a project previously. It is a replacement of the TCA530 IC what can be found in many FM radios before the era of the digital synthesis (PLL). It is a precision power supply for varicap diodes and AFC circuit. As it has an internal heated reference, but reside in a PDIP package, it intend to die after 30-40 years.</div><div>So I found a schematic for the replacement. I made some minimal adjustment on it, and shrink to fit two small PCBs, make it a pop in replacement (it is just higher than the original IC, but most of the cases it is not an issue).</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5vJfwjPWokU7-uTBLm5ivJ1g9NgzrWrwFCpn0vKkqjFVmywDtcL49G8jd9C97oqnQrda2-iweMo9h9fHPtjp8CiUMq6JPO-aDStcqLZzfNMQpII9yR_R_Ui9iZf8F8GJm_yAUtb93uJQDi6r1kDtfOy3MOKqEIe0lLVeCh2We5rEj3PM622n5z2AP/s1403/1st%20unit.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="881" data-original-width="1403" height="201" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5vJfwjPWokU7-uTBLm5ivJ1g9NgzrWrwFCpn0vKkqjFVmywDtcL49G8jd9C97oqnQrda2-iweMo9h9fHPtjp8CiUMq6JPO-aDStcqLZzfNMQpII9yR_R_Ui9iZf8F8GJm_yAUtb93uJQDi6r1kDtfOy3MOKqEIe0lLVeCh2We5rEj3PM622n5z2AP/s320/1st%20unit.jpg" width="320" /></a></div><br /><div>This unit has some issues (questionable AFC performance, different reference voltage), so I intend to develop a v2 version, but now, from my own ideas and not a publicly available circuit diagram.</div><div>For this I was eagerly needing a working original IC.</div><div>I ordered two, it wasn't cheep. Arrived. One of my family members took the package.</div><div>It was put somewhere in the flat, so disappeared forever.</div><div>Ok, so ordered second time, now it is here</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgdeTeYUzxHOw7UlFT7O8zQWVr5i1GODwZ50QP27ZGhA87NwMBIqMu5_w5YTImW2CeS5CCfbCF-f2igZKZKbPCpoqBYwoHGLGeaBKjjirZWe9chjhZU69uBq0Wv3C_6Pjnh4yg_IgLdLEVm0kHf7rXqBkG6-NHa89DHH4Y1SfsidDpn1cvX5L4dUWYV/s4032/2023-01-10%2013.37.50.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgdeTeYUzxHOw7UlFT7O8zQWVr5i1GODwZ50QP27ZGhA87NwMBIqMu5_w5YTImW2CeS5CCfbCF-f2igZKZKbPCpoqBYwoHGLGeaBKjjirZWe9chjhZU69uBq0Wv3C_6Pjnh4yg_IgLdLEVm0kHf7rXqBkG6-NHa89DHH4Y1SfsidDpn1cvX5L4dUWYV/s320/2023-01-10%2013.37.50.jpg" width="240" /></a></div><br /><div>No, please don't even ask. It is not for sale. At least until, the v2 replacement is ready.</div><div>2023.01.09: The local government operated post are mostly a bunch of idiots. A package arrived for me to a post office, what is not the close one to the delivery address and not the central distribution center. They just put there (I guess) randomly.</div><div>Anyway. Picked it up:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiigYFwG6a8-q-8YxcaCYOCliNnvPDyO3Ou8wod9ngoKRXIm4_rc-khT4xRi8qfwJWW5pt7nNH9D7_7tZ4cGckvSZyR5Pw97vTUbDPf2TMf8r65VlIhhuAOwunwbMXCBTQov2QrbXMJxoomeCGrMKkxY44oyca86lOLZZwkJFZjmFM7bMMOqjQ1R1FL/s4032/2023-01-10%2007.46.29.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiigYFwG6a8-q-8YxcaCYOCliNnvPDyO3Ou8wod9ngoKRXIm4_rc-khT4xRi8qfwJWW5pt7nNH9D7_7tZ4cGckvSZyR5Pw97vTUbDPf2TMf8r65VlIhhuAOwunwbMXCBTQov2QrbXMJxoomeCGrMKkxY44oyca86lOLZZwkJFZjmFM7bMMOqjQ1R1FL/s320/2023-01-10%2007.46.29.jpg" width="320" /></a></div><br /><div>Finally: spare screen protector, vats, fep foils arrived. With this my Anycubic order is complete. Five separate shipments of one single order. I think it is neither economical nor environment friendly. 😕</div><div>Anyway, I can start my resin experiments as soon I get there, to have time for it.</div><div>Same day. Currier came:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisR9WGWIGJuQOpVmcV7wEeQ6bPfgj7ihsmgmToFh1JsEtkMiDaKC8Du_6JarPYgeGJEmopv3BWokySnqK9INeindzs5N8Cim69K6C1A3mNK_4wGCAqYfUSZztvtzu9Y1XE01aXHcDCbMRxAAytae9lDu8cYvmtMwyVzlGwa5dIgPO7jDBGfmohfMeR/s4032/2023-01-09%2014.10.20.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisR9WGWIGJuQOpVmcV7wEeQ6bPfgj7ihsmgmToFh1JsEtkMiDaKC8Du_6JarPYgeGJEmopv3BWokySnqK9INeindzs5N8Cim69K6C1A3mNK_4wGCAqYfUSZztvtzu9Y1XE01aXHcDCbMRxAAytae9lDu8cYvmtMwyVzlGwa5dIgPO7jDBGfmohfMeR/s320/2023-01-09%2014.10.20.jpg" width="240" /></a></div><br /><div>Big ass ESP32 board. Ordered it for some USB/Bluetooth HID experiments. I've an idea in my mind, so, we will see (as soon the current projects ready)</div><div>Same shipment:</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitzwCrOy5lkYGnWWefcibSTO7gIYmGi4tTxRS0oMboMrVF-2ChrgpnUv-4e5edUbUKIUpOvf7qROlE1AUdGO0J8SvSToM8V46iDkbGpGyjDv0-qOe4LuZNCD7XXvpT48eGHiM2qc2umdpaXVpt6IibngcNVLZ6pCz0vE5BpEcpdDAiY-aq8s0ZYEYz/s4032/2023-01-09%2014.10.26.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitzwCrOy5lkYGnWWefcibSTO7gIYmGi4tTxRS0oMboMrVF-2ChrgpnUv-4e5edUbUKIUpOvf7qROlE1AUdGO0J8SvSToM8V46iDkbGpGyjDv0-qOe4LuZNCD7XXvpT48eGHiM2qc2umdpaXVpt6IibngcNVLZ6pCz0vE5BpEcpdDAiY-aq8s0ZYEYz/s320/2023-01-09%2014.10.26.jpg" width="240" /></a></div><br /><div>Four different microphone module. I need it for my current project. I'll write about later. It has a same secrecy as my Melodyn project was - it can be presented when the surprise factor is over. In mid March.</div><div>2023.01.14: I was on the monthly HAM flea market as usual in the last few month.</div><div>As previously this time also picked up some interesting things.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsSK60pfSCp3FhsVWcWL-vqe6wOPGCxmTC7VtRdhwcGRzU3UiNCX0nDAQ-AheCj9AIFvXP61r7k8mCJTDI2dNetOTdGUt1YYBuXIsdfiFLr0TkApHe2frhm_x7BBrTxi-Ee9tzpIwylldEhBhra4AJ1Z-uuyaPYQPw-AKcoZmHjEcW31D9Xa6hmbfo/s4032/2023-01-14%2010.13.32.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsSK60pfSCp3FhsVWcWL-vqe6wOPGCxmTC7VtRdhwcGRzU3UiNCX0nDAQ-AheCj9AIFvXP61r7k8mCJTDI2dNetOTdGUt1YYBuXIsdfiFLr0TkApHe2frhm_x7BBrTxi-Ee9tzpIwylldEhBhra4AJ1Z-uuyaPYQPw-AKcoZmHjEcW31D9Xa6hmbfo/s320/2023-01-14%2010.13.32.jpg" width="320" /></a></div><br /><div>AC milivoltmeter. Yes I know it is East-German, it is not the best quality. But it look clean, and I guess for $15 still worth it. I wanted to have an analog AC millivolt meter, but two channel dual needle configuration, but for a while, I can use this if needed.</div><div>A bonus thing (unfortunately, not mine):</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAjC6qqvX_Mc74eM6cL84F9H9me6zzSQsI7YzT6816Y_hTIlkR3udAHRXaCIn1FfDSj2z6dXeBvzclYMA_tzLXoH0UgZt_kVcxnE2jEvh8fazcG_P-Wch4S6drjMw2YIvHgGFNuU7frBPNJi2VFcrke2Wj0RbSEDhT6rjOLsiI1thDtZ679iKiLR1F/s3771/FD170GX32AA-100A_Back.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1187" data-original-width="3771" height="126" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAjC6qqvX_Mc74eM6cL84F9H9me6zzSQsI7YzT6816Y_hTIlkR3udAHRXaCIn1FfDSj2z6dXeBvzclYMA_tzLXoH0UgZt_kVcxnE2jEvh8fazcG_P-Wch4S6drjMw2YIvHgGFNuU7frBPNJi2VFcrke2Wj0RbSEDhT6rjOLsiI1thDtZ679iKiLR1F/w400-h126/FD170GX32AA-100A_Back.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOa_bki_f0YsdFvqQe5QAzq9QZfU5NrIv-OaFrthZ-LR6iy0gKqS4t9fNFN7-NlTzGkw5tbeOx3wn7xGlSz1OwsGFL61LFHw3m_heyvOrGn7SKFXThMrJ-ObH3QJWPvheYZJzx69OMQL28qUf4V_yVeJssQVNI6gX3P9Yfb5izGdZH8huFSlWEyO9U/s3506/FD170GX32AA-100A_Front.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1092" data-original-width="3506" height="125" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOa_bki_f0YsdFvqQe5QAzq9QZfU5NrIv-OaFrthZ-LR6iy0gKqS4t9fNFN7-NlTzGkw5tbeOx3wn7xGlSz1OwsGFL61LFHw3m_heyvOrGn7SKFXThMrJ-ObH3QJWPvheYZJzx69OMQL28qUf4V_yVeJssQVNI6gX3P9Yfb5izGdZH8huFSlWEyO9U/w400-h125/FD170GX32AA-100A_Front.jpg" width="400" /></a></div><br /><div>It is a Bizerba weight scale large VFD display. Got it from a friend on the flea market, to do the hard work of reverse engineering, additional hardware design and driver writing for Arduino.</div><div><br /></div><div><br /></div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-83709043034435165412023-01-09T21:25:00.000+01:002023-01-09T21:30:02.660+01:00AS/400 and me<div>A friend of my contacted me a few days ago for some casual conversation what I really appreciate. Doesn't happen too frequently these days.</div><div>He was mentioning, that currently he is working on rewriting some old IBM AS/400 based software to modern Web 2.0 application. This reminded me a funny story regarding AS/400 from my rookie past, what I'd like to share here.</div>Alcoa has a facility in Hungary. Back that days they had a wide operation here. Manufacturing plastic bottles, operating aluminum smelter, building aluminum boxes for truck bases (like Coca-Cola trucks), and so on.<div>I was working for Hewlett-Packard that time. We had a worldwide project at Alcoa for desktop PC provisioning. Sophisticated desktop management platforms (like SCCM) didn't exists that days.</div><div>So HP wrote some scripted MS Test based scripted platform for this, what, I can tell you, wasn't the best.</div><div>Actually the local Alcoa had some weird network configuration, mad this provisioning continuously fail.</div><div>So, my colleagues called me, to go onsite and try to resolve the issue.</div><div>I was sitting in the server room with a PC, for long time, and trying to figure out the issue.</div><div>It was a thick PC size black box under the table I was working on. </div><div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEi1Iq0X4G_KZvxM5_d-ANeoF8QraGpMDwWvLX4OEbHuivuMa682uAwIhcrCxdDgBWmdoFh1ubEsDa1teRSNJ8OcPaDKLMIJv6T8dxTqSwjv7GVQCDkafIOaMFUL_EyLQ2FdWuTUp-BX9Z68i3wFmq1F5n1qIIGAlEoluxC1MiM-3ZveR2BdAQqJlySc" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="800" data-original-width="669" height="400" src="https://blogger.googleusercontent.com/img/a/AVvXsEi1Iq0X4G_KZvxM5_d-ANeoF8QraGpMDwWvLX4OEbHuivuMa682uAwIhcrCxdDgBWmdoFh1ubEsDa1teRSNJ8OcPaDKLMIJv6T8dxTqSwjv7GVQCDkafIOaMFUL_EyLQ2FdWuTUp-BX9Z68i3wFmq1F5n1qIIGAlEoluxC1MiM-3ZveR2BdAQqJlySc=w335-h400" width="335" /></a></div><div class="separator" style="clear: both; text-align: center;">Just illustration, not the exact unit</div><br />So I put my feet on the top of it.</div><div>A guy came into the room. When he seen what I'm doing, his face become white.</div><div>He said slowly: Please remove your feet from the AS/400. That unit controls the aluminum smelter. If you eventually switch it of, the smelter will cool down and can't be heated once more.</div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-35099310537989883432023-01-09T12:10:00.001+01:002023-01-09T12:12:55.545+01:00EPROM burning 21/25V 3. - Closing<div>The first two parts of this post:</div><div><a href="https://pakahuszar.blogspot.com/2021/03/eprom-burning-2125v-1.html" target="_blank">https://pakahuszar.blogspot.com/2021/03/eprom-burning-2125v-1.html</a></div><div><a href="https://pakahuszar.blogspot.com/2021/03/eprom-burning-2125v-2.html" target="_blank">https://pakahuszar.blogspot.com/2021/03/eprom-burning-2125v-2.html</a></div>Back in 2021 I was starting this project based on this ground:<div><ul style="text-align: left;"><li>The TL866II is unable to handle any device programable above 18V</li><li>My HP 8903B has 21V EPROMs and I wanted to refresh them</li><li>The T56 programmers cost are way above the amount I would pay for this</li></ul></div><div>Since then a few things happened. First I lost the ordered boards of this project. During the moving to my new lab, I was unable to find, where are those. Actually just 2-3 month ago showed up from one of my boxes. I was ordering the parts needed to build it, but had other projects to work on, so put it aside second time.</div><div>Bit later I realized that the XGECU (the manufacturer of the TL866II and T56) come out with a new programmer model the T48. It has reasonable price and the plugin modules I already bought for the TL866II are compatible with it.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8RG7X7Ij0q55BV8m78C1Ts5wPxRP3w8rjEahdxjZ4pFMsHe6AN_o1JWQqR4AOczzkB8QkfDNOXVfwyIQl9RdWQWEp1Y5zsShPRQgh08II611KCMj8-7GITAIlJyCoitutnuqlsnpr6yAcl5tiKYBR2RHD5AqIRv-0bSS9MuXfbEiF1Nvfxff29g63/s4032/2023-01-09%2012.02.54.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8RG7X7Ij0q55BV8m78C1Ts5wPxRP3w8rjEahdxjZ4pFMsHe6AN_o1JWQqR4AOczzkB8QkfDNOXVfwyIQl9RdWQWEp1Y5zsShPRQgh08II611KCMj8-7GITAIlJyCoitutnuqlsnpr6yAcl5tiKYBR2RHD5AqIRv-0bSS9MuXfbEiF1Nvfxff29g63/w300-h400/2023-01-09%2012.02.54.jpg" width="300" /></a></div><div><br /></div><div><br /></div><div>Ordered it, programmed the EPROMs for my HP 8903B. So the story ends here from my perspective.</div><div>This project shelved, I not intend to build it. Maybe once, I'll try. Actually, I not even now if it id work. Anybody want to experiment with it, welcome. I can give a board for this.</div><div>Also my original TL866II will be on sale soon.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2zsGsY1WggC-t1lWdtczBUVc4x3bjwIQVeejuD2iXabT05jiXz8Sy1IWomRFR2urKw73MyJcSxVj8abu7c7k7eko7WvthuAhjFU-Z5zuVd-jzukJamcFkhhxn0HaEFq0f2lcb1EBzroJu-694I4hwPWvFgwQdGOoAzAK9FMspb51shndXOThlfz1J/s4032/2023-01-09%2012.02.39.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh2zsGsY1WggC-t1lWdtczBUVc4x3bjwIQVeejuD2iXabT05jiXz8Sy1IWomRFR2urKw73MyJcSxVj8abu7c7k7eko7WvthuAhjFU-Z5zuVd-jzukJamcFkhhxn0HaEFq0f2lcb1EBzroJu-694I4hwPWvFgwQdGOoAzAK9FMspb51shndXOThlfz1J/w400-h300/2023-01-09%2012.02.39.jpg" width="400" /></a></div><br /><div>On the side of it, I planed to build a proper EPROM eraser. I ordered one, with the T48. It has mechanical timer, and not something, what I really like, but it does its job, so the EPROM eraser project also canceled.</div>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-23276186887097850162023-01-03T16:00:00.001+01:002023-01-03T16:14:05.763+01:00Azure, AKS, Terraform, proxy<p></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEiNH1j0S7ZHUA_nH63CxO9PsmOxK25MRWIqM_50gNKoJQ6fF1hotNtY6cOxQRUbA2mAKiwnoFun9SuDpi9a6LeuRJgsruzU88BBT2cfP2EWv3Fkq_AdSEijDssoiMu9H4OjsEqafYe6_ytD8F8Y8sgEI3Fa2LGZQf4jlpcbkpAVQtUo8BS6Y-wNMGuv" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="264" data-original-width="300" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEiNH1j0S7ZHUA_nH63CxO9PsmOxK25MRWIqM_50gNKoJQ6fF1hotNtY6cOxQRUbA2mAKiwnoFun9SuDpi9a6LeuRJgsruzU88BBT2cfP2EWv3Fkq_AdSEijDssoiMu9H4OjsEqafYe6_ytD8F8Y8sgEI3Fa2LGZQf4jlpcbkpAVQtUo8BS6Y-wNMGuv" width="273" /></a></div><br />Happy New Year to everybody!<p></p><p>It maybe unexpected, but I start the year with some professional content and not my hobbies.</p><p>When you try to deploy an Azure Kubernetes Cluster from Terraform, and the cluster has proxy configuration, on any terraform apply on the cluster will cause redeployment, what is not what you expect.</p><p>The reason is that the Azure mechanism add a few addresses to the no_proxy list in addition to the ones you set. Changing the no_proxy list will force recreation. The list stored in the state will always be different from the list on the AKS resource itself.</p><p>First let check, what are those addresses:</p><p></p><ul style="text-align: left;"><li><b>localhost</b> and <b>127.0.0.1</b> - need no explanation, it is the VM loopback address</li><li><b>konnectivity</b> - Kubernetes Konnectivity service</li><li><b>168.63.129.254</b> - Azure platform resources: <a href="https://learn.microsoft.com/en-us/azure/virtual-network/what-is-ip-address-168-63-129-16">https://learn.microsoft.com/en-us/azure/virtual-network/what-is-ip-address-168-63-129-16</a></li><li><b>169.254.169.254</b> - Azure Instance Metadata Service: <a href="https://learn.microsoft.com/en-us/azure/virtual-machines/linux/instance-metadata-service">https://learn.microsoft.com/en-us/azure/virtual-machines/linux/instance-metadata-service</a></li><li>Address space of the VNET where the cluster installed</li><li><b>pod_cidr</b> of the AKS cluster. Default: <b>10.244.0.0/16</b></li><li><b>service_cidr</b> of the AKS cluster. Default: <b>10.0.0.0/16</b></li><li>If it is a private cluster, cluster's private_fqdn. It looks like this: <b><i><clustername>-<8 hex random number>.<DNS Zone Guid>.privatelink.<region>.azmk8s.io</i></b></li></ul><p></p><p>The values above, can be known before the cluster creation, except the last one. This is created during the deployment of the cluster, so adding all of the items to your no_proxy list before the cluster creation will not help, if you have a private cluster.</p><p>What you can do:</p><p>Add lifecycle management to the cluster. It will look like this:</p><div style="background-color: #1e1e1e; color: #d4d4d4; font-family: Consolas, "Courier New", monospace; font-size: 14px; line-height: 19px; white-space: pre;"><div><span style="color: #4ec9b0;">resource</span> <span style="color: #4fc1ff;">"azurerm_kubernetes_cluster"</span> <span style="color: #4fc1ff;">"aks"</span> {</div><div> <span style="color: #4ec9b0;">lifecycle</span> {</div><div> <span style="color: #9cdcfe;">ignore_changes</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span>[<span style="color: #9cdcfe;">http_proxy_config</span>.<span style="color: #9cdcfe;">no_proxy</span>]</div><div> }</div><div> .</div><div> .</div><div> .</div></div><p>This would work, but you just half way to the solution.</p><p>When you reapply your plan, it will not recreate the AKS cluster. But what if you willingly change the no_proxy parameters? In this case this will still ignored and the AKS doesn't recreate, what is not the expected behavior.</p><p>Lets assume, you heave the user provided no_proxy parameters in a no_proxy variable:</p><div style="background-color: #1e1e1e; color: #d4d4d4; font-family: Consolas, "Courier New", monospace; font-size: 14px; line-height: 19px; white-space: pre;"><div><span style="color: #4ec9b0;">variable</span> <span style="color: #4fc1ff;">"no_proxy"</span> {</div><div> <span style="color: #9cdcfe;">type</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span><span style="color: #569cd6;">list</span></div><div> <span style="color: #9cdcfe;">default</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span>[]</div><div>}</div></div><p>The lifecycle management is able to trigger recreation of the resource with <b>replace_triggered_by</b> property. The problem with it, that the variable above, can't be the source of the trigger. But for example a resource can.</p><p>Here comes a dirty trick. How convert a variable list into a resource?</p><p>Hashicorp has a Terraform provider named <b>tfcoremock</b> (<a href="https://registry.terraform.io/providers/hashicorp/tfcoremock/latest/docs">https://registry.terraform.io/providers/hashicorp/tfcoremock/latest/docs</a>). I'll use it here.</p><p>First add it to the providers list:</p><div style="background-color: #1e1e1e; color: #d4d4d4; font-family: Consolas, "Courier New", monospace; font-size: 14px; line-height: 19px; white-space: pre;"><div><span style="color: #4ec9b0;">provider</span> <span style="color: #4fc1ff;">"tfcoremock"</span> {</div><div> <span style="color: #9cdcfe;">use_only_state</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span><span style="color: #c586c0;">true</span></div><div>}</div></div><p>Now, we can store the list above into the state:</p><div style="background-color: #1e1e1e; color: #d4d4d4; font-family: Consolas, "Courier New", monospace; font-size: 14px; line-height: 19px; white-space: pre;"><div><span style="color: #4ec9b0;">resource</span> <span style="color: #4fc1ff;">"tfcoremock_simple_resource"</span> <span style="color: #4fc1ff;">"user-noproxy"</span> {</div><div> <span style="color: #9cdcfe;">count</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span><span style="color: #9cdcfe;">var</span>.<span style="color: #9cdcfe;">no_proxy</span></div><div> <span style="color: #9cdcfe;">string</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> var</span>.<span style="color: #9cdcfe;">no_proxy</span>[<span style="color: #9cdcfe;">count</span>.<span style="color: #9cdcfe;">index</span>]</div><div>}</div></div><p>Now, we can reference it from the replace_triggered_by:</p><div style="background-color: #1e1e1e; color: #d4d4d4; font-family: Consolas, "Courier New", monospace; font-size: 14px; line-height: 19px; white-space: pre;"><div><span style="color: #4ec9b0;">resource</span> <span style="color: #4fc1ff;">"azurerm_kubernetes_cluster"</span> <span style="color: #4fc1ff;">"aks"</span> {</div><div> <span style="color: #4ec9b0;">lifecycle</span> {</div><div> <span style="color: #9cdcfe;">replace_triggered_by</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span>[<span style="color: #9cdcfe;">tfcoremock_simple_resource</span>.<span style="color: #9cdcfe;">user-noproxy</span>]</div><div> <span style="color: #9cdcfe;">ignore_changes</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span>[<span style="color: #9cdcfe;">http_proxy_config</span>.<span style="color: #9cdcfe;">no_proxy</span>]</div><div> }</div><div> <span style="color: #4ec9b0;">http_proxy_config</span> {</div><div> <span style="color: #9cdcfe;">http_proxy</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> var</span>.<span style="color: #9cdcfe;">http_proxy</span></div><div> <span style="color: #9cdcfe;">https_proxy</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> var</span>.<span style="color: #9cdcfe;">http_proxy</span></div><div> <span style="color: #9cdcfe;">no_proxy</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> var</span>.<span style="color: #9cdcfe;">no_proxy</span></div><div> }</div><div> .</div><div> .</div><div> .</div><br /><div>}</div></div><p>This is almost perfect, but not completely.</p><p>When you change any element in the no_proxy variable list, it will trigger the replacement, but if you add, or remove element from the list, it will ignore it.</p><p>One last step. Make the length of the list into work:</p><div style="background-color: #1e1e1e; color: #d4d4d4; font-family: Consolas, "Courier New", monospace; font-size: 14px; line-height: 19px; white-space: pre;"><div><span style="color: #4ec9b0;">resource</span> <span style="color: #4fc1ff;">"tfcoremock_simple_resource"</span> <span style="color: #4fc1ff;">"user-noproxy"</span> {</div><div> <span style="color: #9cdcfe;">count</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span><span style="color: #dcdcaa;">length</span>(<span style="color: #9cdcfe;">var</span>.<span style="color: #9cdcfe;">no_proxy</span>)</div><div> <span style="color: #9cdcfe;">string</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> var</span>.<span style="color: #9cdcfe;">no_proxy</span>[<span style="color: #9cdcfe;">count</span>.<span style="color: #9cdcfe;">index</span>]</div><div>}</div><br /><div><span style="color: #4ec9b0;">resource</span> <span style="color: #4fc1ff;">"tfcoremock_simple_resource"</span> <span style="color: #4fc1ff;">"user-noproxy-count"</span> {</div><div> <span style="color: #9cdcfe;">number</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span><span style="color: #dcdcaa;">length</span>(<span style="color: #9cdcfe;">var</span>.<span style="color: #9cdcfe;">no_proxy</span>)</div><div>}</div><br /><div><span style="color: #4ec9b0;">resource</span> <span style="color: #4fc1ff;">"azurerm_kubernetes_cluster"</span> <span style="color: #4fc1ff;">"aks"</span> {</div><div> <span style="color: #4ec9b0;">lifecycle</span> {</div><div> <span style="color: #9cdcfe;">replace_triggered_by</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span>[<span style="color: #9cdcfe;">tfcoremock_simple_resource</span>.<span style="color: #9cdcfe;">user-noproxy</span>, </div><div><span style="color: #9cdcfe;"> tfcoremock_simple_resource</span>.<span style="color: #9cdcfe;">user-noproxy-count</span>]</div><div> <span style="color: #9cdcfe;">ignore_changes</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> </span>[<span style="color: #9cdcfe;">http_proxy_config</span>[<span style="color: #b5cea8;">0</span>].<span style="color: #9cdcfe;">no_proxy</span>]</div><div> }</div><div> <span style="color: #4ec9b0;">http_proxy_config</span> {</div><div> <span style="color: #9cdcfe;">http_proxy</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> var</span>.<span style="color: #9cdcfe;">http_proxy</span></div><div> <span style="color: #9cdcfe;">https_proxy</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> var</span>.<span style="color: #9cdcfe;">http_proxy</span></div><div> <span style="color: #9cdcfe;">no_proxy</span><span style="color: #9cdcfe;"> </span>=<span style="color: #9cdcfe;"> var</span>.<span style="color: #9cdcfe;">no_proxy</span></div><div> }</div><div> .</div><div> .</div><div> .</div><br /><div>}</div></div><p>Now, it is replace the AKS on any change in the no_proxy variable list, but keep it intact otherwise.</p>SUFhttp://www.blogger.com/profile/16262394544697275824noreply@blogger.com0tag:blogger.com,1999:blog-125721937782888319.post-52471027691939878332022-12-31T11:10:00.001+01:002022-12-31T11:13:14.967+01:00End of 2022<p>This is some valuation of the year from this blogs perspective.</p><p>At the beginning of the year I was planning to write at least one post weekly. This would be 52 posts. Actually done 31.</p><p>Although, I'm not satisfied with the result, I is better than the previous years. The last year I was writing more, was 2018. I intend to achieve this as a goal for 2023.</p><p>Some highlights of 2022, also from my hobby perspective:</p><p></p><ul style="text-align: left;"><li>My new lab is still not finished, but I can tell, I moved in. Now I feel comfortable and spend more and more time in it</li><li>Finished the Videoton Melodyn project. I'm very proud of it. It was ready in time and functioning flawlessly</li><li>I closed my Hungarian language blog, what was running in parallel with this one. The decision come from anger at the first place, but today I feel, not writing (or translating) in to languages spare some time to me. So I keep it that way.</li><li>Started a few projects, what looks like shelved to me, also have a few revisited, but put back to the shelve:</li><ul><li>E1300A Front connectors</li><li>Measurement control</li><li>CNC Router</li><li>Pan & Tilt gimbal</li><li>TL866II EPROM programmer update</li><li>PM3082 repair</li><li>Rackmount power amplifier</li><li>Function generator power amplifier</li><li>Contract project involving 4-20mA current loop and infra gates (not to discuss here deeper)</li><li>VFD display driver (even the first post of it kept in draft)</li></ul></ul><p></p><p>In 2023, I plan to work on my projects on a more organized way. Not to do many projects in parallel, focus on one, and finish it.</p><p>Also in 2020, I started to work on "project of the month", to force myself, to finish things in timely manner. This was washed by the COVID right at the beginning. I want to bring this back to life, to trigger myself.</p><p>Here I announce my January project (I really like to continue with more in February and further):</p><h4 style="text-align: left;">Fully working 3D printing</h4><p>I've three 3D printers now. Actually only one of it working, and that one even kept in my old lab. Namely Anet A8, Geeetech i3 Pro, Anycubic Photon Mono 4k.<br />The goal, to have those fully working by end of January.</p><p>Those were my random thoughts for the end of 2022. I say good bye to 2022 with my current lab photos, and whish a</p><p>HAPPY NEW YEAR!</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKkwEwpqgqlIijak0AoJsM2WuHqbSKDLuBdkLJDxNHyLKjXswLqCRutwKqc332WYOADGIWORnF37KJAlJxWtfGQWkQd_P1gq7lrWgnzdV9rL35VGi1d9l9Q-ubrmqsqsjFZjjudcbe18kKybuTA3tuqiLYrTnT-qzYeAoiFUY9FsDSeJxPpsiC6yte/s4032/2022-12-31%2010.32.57.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="3024" data-original-width="4032" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKkwEwpqgqlIijak0AoJsM2WuHqbSKDLuBdkLJDxNHyLKjXswLqCRutwKqc332WYOADGIWORnF37KJAlJxWtfGQWkQd_P1gq7lrWgnzdV9rL35VGi1d9l9Q-ubrmqsqsjFZjjudcbe18kKybuTA3tuqiLYrTnT-qzYeAoiFUY9FsDSeJxPpsiC6yte/w400-h300/2022-12-31%2010.32.57.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibtdPQhTzaxmQPDyU0hx-7OgJqY1w_VUbgDtJ2lDCFOI4dQVPvdcpj4Lf22rz7AswmKIcOfnLXmeeSw5jlfGkOrsRK_Kd6k_7lstGsmng76fd37O0K_WXkkL-P4i5fGptM2EYcwb9Ii5n1iQzga2F8lXThL7oXxP7zjSUfgv9M2BwNCdS0UAz8W2vZ/s4032/2022-12-31%2010.33.13.jpg" imageanchor="1" style="margin-left: 1em; 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