I have a string of LEDs that run off of 110V DC and I would like to control them with the arduino.
I first used the octocoupler included in the starter kit to turn them on and off. No issues there.
But then I decided I would like to make them fade in and out. I found that the octocoupler couldnt switch fast enough to do this, so I instead tried to use a transistor, and grounded the arduino to the 110v ground.
Well.. I must have done something wrong because the arduino exploded :-[
Could anyone suggest a circuit diagram for wiring an arduino uno to pwm a 110v string of LEDs?
thanks in advance! Cheers, - James