Arduino MEGA2560 Standalone I had an Arduino UNO (ATmega168) standalone working, but I need more pins, and I decided to use the ATmega2560, I was searching for some schematics, and none of them shown an ATmega2560 standalone, only the full Arduino, with the FTDI, power transformers... etc integrated. So taking parts from those designs, I made this, but I don't know if it's enough or I need Something more:


Note: VCC2 is connected to 5V.
You need more decoupling capacitors - one per VCC and AVCC pin, plus a larger (10µF) for the whole chip.

You need a pullup resistor (and maybe button) on RESET.