- Joined Apr 13, 2021
I have a spare Intel E29477-002 stock cooler which I want to turn into a battery fan with a Low/Off/High SP3T switch. When lowering the voltage to 5v on the low setting, it makes a high pitched humming noise while it's spinning . On the high setting (9v) it spins at full speed w/o the hum. How do I fix the humming noise on the low setting?