Hello,
I'm trying to use a PWM controller to control a 12v PC fan. When I wire it up, it controls the fan as expected but there is a loud squealing noise coming from the fan that changes pitch when I change the fan speed. Can anyone help me understand why this is happening and hopefully fix it?
Here's the PWM unit I have:
http://www.amazon.com/LEDwholesalers...1&keywords=Pwm
Thanks very much!
I'm trying to use a PWM controller to control a 12v PC fan. When I wire it up, it controls the fan as expected but there is a loud squealing noise coming from the fan that changes pitch when I change the fan speed. Can anyone help me understand why this is happening and hopefully fix it?
Here's the PWM unit I have:
http://www.amazon.com/LEDwholesalers...1&keywords=Pwm
Thanks very much!