How to stop EMI from a pwm-fan

[TomGeorge]

Hi,
Your fan looks okay, i can find data sheets on it , but none say what the PWM frequency should be.

If it is a PC fan then

google PC pwm fan control frequency

It refers to a PWM frequency of 25kHz.

I know these are old posts but they may help'

http://forum.arduino.cc/index.php/topic,15514.0.html

http://forum.arduino.cc/index.php/topic,18742.0.html

Tom...