2014. augusztus 31., vasárnap

USB supply - teardown

I'm sure you know that small slim power supplies what you connect to the mains and it has a USB on the top. That ones, what supplied for the iPhone.
I broke one of the mains legs.
I took it apart. Not the one supplied for the iPhone but a similar one, so there is no warranty that it is the same inside.
Here it is:

That's all.
The key component is a an ATS1636 named chip. It is manufactured by the "well known" ArtChip. Thay have a website. It is located on the artchipsemi.com address. The content is: 503 Service Unavailable.
I found a datasheet also:

The chip according to the datasheet - because my Chinese is sooo good :-D (google translate):

"ATS1636 is suitable for low-cost, high-precision constant current and voltage requirements
(CC / CV) applications. Constant current loop without optocouplers, TL431 and complement
Compensation circuitry integrated 700V power MOSFET, reducing system cost.
ATS1636 meet the output voltage of ± 5% production accuracy. Pole
Low starting current, accurate detection can easily meet EPA2.0 bottom
Energy efficiency requirements. Output cable voltage compensation can be based on customer
The required adjustment, greatly facilitate the customer on the system design.
ATS1636 also integrates several protection features: undervoltage lockout, the former
Edge blanking, overvoltage protection, overcurrent protection, open loop protection, lose
Short circuit protection, which greatly increases the stability of the system. ATS1636
SOP-8 package is provided, ATS1636S for SOP-7 package.

I found a schematic diagram what mostly covers the thing what I have:

2014. augusztus 30., szombat

Back to work

The vacation is over. We arrived back to home. From Monday I'm going back to work, and the school is opening also.
I was thinking a lot during my vacation. Many new project ideas come into my mind, and I was thinking, how can I change on the fact, that many of my projects are waiting to be get finished. More and more projects, longer and longer.
There come the idea to announce for myself the POM (Project Of the Month). From this moment I will assign a project to every month, what will be finished in that month. Will it work? I don't know, we will see.
I want to start with simple things.

2014. augusztus 14., csütörtök


After a long waiting it is arrived. This is the first thing I backed on the Kickstarter and arrived.
Here it is:

Now the question is when will happen the first project I can use it in.

2014. augusztus 11., hétfő


Yet another meeting with the Arduino IDE. The subject doesn't changed. The Marlin firmware.
The IDE once more proved it's incredible usability. What if I have more files than fit on the screen?
3D Printer Marlin firmware on 1920x1200-as monitor (screenpart):

I'd like to open something! Yes, you see correctly, something there, down below!
My opinion about the Arduino Erich Styer phrased precisely here:

"Maybe it is just me: I respect the ‘Arduino way of programming’, but it is just not the way I think development should be done. I need full control of the hardware which includes deep inspection (debugging) of the application. Because in my experience the hard problems (and there are many!) of embedded development can only be solved with good debugging tools."

CNC - It is arrived!

The postman came. And he bring this:

My shiny new 400W spindle motor for the CNC.
I think, I'll put it together tonight.

2014. augusztus 6., szerda


I'm interested in the photovoltaic systems for a while (I'll get it once).
A few days ago in one of the manufacturers newsletter I seen a link. The Google and the IEEE started a challenge for designing and building a high efficiency small size photovoltaic inverter:

On my own not experienced in power electronics, but if somebody interested and has knowledge can participate. The registration deadline is  2014. September 30. The first prize: