Well, haw fat do you want the caps? The value depends on two things: A-how much current the Arduino draws, and 2) how much it supplies to the rest of the circuit.Thank you for the additional suggestions. I've updated the drawing to reflect the new switch wiring suggestion, and added caps on the right side. What sort of values would be good for "fat caps" C1 and C2?
I'm wondering if it would still be a good idea to have a small value resistor in the line that connects to input pin A3? Just wouldn't want to burn out the pin, but I might be concerned over nothing here.
A software error?! That would never happen. Oh wait, I'm also the one coding this... ThanksA low value resistor in series would prevent a software error (making the pin an output) from burning something out.
Bob