what resistor should I be using for these 12v 50mA momentary buttons for my Ar3

larryd:
Rating:DC12V, 50MA
This could imply there is already a resistor in the switch, BUT you will have to prove this.Don't really know and I have not bought it yet -

Are you going to be using 12v? [color=red]NO[/color]

Show us a good schematic of your proposed circuit.
Show us a good image of your wiring.

e