Hi! I am trying to control a solenoid with Arduino Uno. I want it to go through an optocoupler with darlington driver just in case something goes wrong. Before I try it with solenoid, I wanted to see if everything works with a LED. So I first connected it the same way as in image below, just withou…

help connecting Arduino UNO to n-ch MOSFET via Optocoupler

system October 28, 2012, 7:13pm 6

Put the opto-coupler where R3 is, and parallel it with a zener (or a Esaki diode).

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