This might be a stupid question, but I can't seem to find the answer.
I have a Pro-Mini 16MHz from Sparkfun. I'd like to use all of the pins, but I'm confused about how I would define the use of both the A3 and D3 pins. I know I can't just say pin 3 right?
I can do analogRead(3) and that's A3 right? Can't I also do digitalRead(3) and that be D3?