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Originally Posted by Incoherent
Now I am assembling a bill of materials and would like some opinions on a suitable PWM frequency for driving fans. As I have it it is running between 250 and >1200Hz depending on gain setting. Is this reasonable?
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A little late but :shrug:
As part of testing out a function generator I just got from the junk shop, I hooked it up to give me a dial-a-frequeny PWM. The whole range of 1 Hz - 100kHz worked; the sweet spot for low noise and wide duty cycle range seemed to be ~900 Hz.