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

Other Hardware Product Design
3

Rating:DC12V, 50MA
This could imply there is already a resistor in the switch, BUT you will have to prove this.

Are you going to be using 12v?

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

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