Is there a way to access and use the A/D external reference, AREF, pin on the Pro Mini? Elsewhere on this Forum, it is indicated that the Sparkfun Pro Mini board does not bring this pin out from the ATmega328 controller. If this is true, can I just solder directly to the AREF pin which is shown as pin 20 on the schematic?
Yes. Make sure you do not bridge pins in the process.
Thanks!