SQX -
Thanks for the reply. I had guessed as much, but am trying to confirm things as I go. I’m wondering what would happen if 5V was hooked up to the Aref pin on the MCU (looks like pin 20 in the documentation I can find for the ATMEGA168-20AU)? Would this then make the full range of the analog inputs be 5V rather than the 3.3V that they currently are???
Thanks again!