I need help, I must carry out a control circuit so that it sends a signal to another force circuit by means of an optocoupler, a relay and an amplifier so that a three-phase motor works but that it only works 22 seconds and then stops I was thinking about using arduino since I find it more reliable please if anyone could help me on how to do it I would appreciate it very much I am new thanks in advance :slight_smile: I want to feed the arduino with 9v


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