do you mean the "a0" pad
Yes.
Are you using the word 'emitter' to mean LED? If so then are you sure that 56R does not exceed the maximum current of 40mA of the arduino output pins. Even 40mA will damage the arduino if you run it for too long.
do you mean the "a0" pad
Yes.
Are you using the word 'emitter' to mean LED? If so then are you sure that 56R does not exceed the maximum current of 40mA of the arduino output pins. Even 40mA will damage the arduino if you run it for too long.