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Old 07-22-20, 09:18 PM   #177
NiHaoMike
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Quote:
Originally Posted by randen View Post
The small pump motor thats being powered by PWM supervised by a thermistor in the liquid cooled heat sink needs a different method. Lower temperatures cause a PWM signal that makes the little pump motor squeal in a high pitch.
Try increasing the PWM frequency to above 20kHz.
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