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Topic: MOFET selection to run 12v (Read 4381 times) previous topic - next topic


What?  You shouldn't recommend this - a power MOSFET gate can be in range 1nF to 20nF, that's like a short-circuit load to an Arduino output pin on short timescales - they can only take 40mA abs max so a gate resistor of 150 ohms or so is recommended. 

OK, we can put it back in again now we know it's not the problem...

I agree, the circuit looks fine on paper. There must be a wiring error somewhere. Time to start measuring voltages at various points in the circuit. The usual culprit is Vgs when people put the transistor before the load in the circuit.

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)


Disconnect the ckt from the Arduino completely, and get it working first on it's own, then hook
to the Arduino. When the gate is pulled up [5 to 12V], the Leds should turn on "brightly", not


The project works! Thank you to EVERYONE on the forum who helped. In short: The MOSFET mentioned in the thread works but I understand not the best one out there...but it does work well.


So how did you get it to work? - Scotty

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