Hey Everyone, I am trying to control an arctic F12 Pro PWM with my Mega 2560. It is a four wire fan, Vc, grd, sensor/tach and PWM. When I plugged it in it runs at high. I Tried to run a fading led sketch, but it had no affect on it. I am using this to cool a LED light over a Reef tank. It will be …

Controlling PC cooling fan that has a PWM input

Using Arduino Motors, Mechanics, Power and CNC

system June 10, 2012, 6:26pm 3

Thanks, Now how do I program the clock/counter to 25kHz and what is the value I use to vary the speed...0-255?
What pin will this effect?
I have a mega 2560
Thanks

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Controlling PC cooling fan that has a PWM input

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