Flyback diode on PWM fan?

[RWB]

This setup worked for me numerous times. Just also add a resistor to the pin running to the FET gate.

PWM Fan Circuit Question

Hey guys @peekay123 @ScruffR @bko I have a quick question about the size of a Diode for the circuit below where I’m basically wanting to control the speed of an 80mm high-speed fan using PWM and an N-Channel MOSFET: [image] I’m powering 3 x 12v - 1 Amp Fans for a total of 30 watts. Is the D1 Diode - The 1N4001 OK when M1 is a 3 amp fan? I think it’s perfectly fine but I wanted to ask to make sure before making a mistake I’m following this project example: http://itp.…