According to the datashep of the ATtiny25 /45/85, they operate between: 2.7 - 5.5V between 0 and 10 Mhz and 4.5V 5.5V between 0 - 20 Mhz. The ps3, I suppose it delivers 12V through pin 2. If necessary, it would be easy to change the AMS1117 5 for a 3.3. One thing in the schematic, starting from...