After programming the microcontroller on my Arduino, I would like to remove it and put it into the board in my project. Is there anything I need to know about hooking a non-Arduino circuit up to the ATMega chip so that it will work the same (As when it's on the Arduino board)? I noticed that there are a few pins on the chip that I'm not sure what to do with, like the AREF and AVCC pins. Also, do the two pins called GND both go to ground, or is only one required?
Thanks