And as GM says
QuoteAnd as GM says ?
General McCarthur ?
First of all a IRF510 will not operate properly with an arduino output pin because it is NOT a logic level mosfet. A logic level mosfet gate can be fully turned on with +5vdc, a non logic level mosfet requires => +10vdc to full turn on.As far as your failure to turn off, I would want to see a wiring drawing of how you actually have things wired up before guessing. First impression is that 100K ohms is awful large to try and discharge the gate capacitance.Lefty
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