This is Gamebuino clone,
more about this game console you can read here http://gamebuino.com/


Look on included brd/sch files
Very easy to assembly, minimum components
but some skills are required etc. smd soldering and USBasp bootloader burn

Known bugs:

- Button A and B are swapped :(
- I had plan to power with LIR2032, but it look like not good idea
- Battery voltage measure is not connected, you need in setup disable
voltage check.
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I have some boards for sale 5$+5$ shipping,
If somebody is interested can write my to bobricius [a] gmail.com