LED had positive and negative pole. only light when voltage is applied in the positive pole....so if reverse then no light because it is actually a diode...where current flow on single way only.......Originally Posted by Sgt_Strider
power and reset sw are just basically contacts only....when depress the contact are just close to send a trigger signal only....
i had always use a screwdriver just to on the com. this way....
as for the led, just had to know which is positive or negative will do or just flip around when it doesn't
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