Posts by RolandP

Hi,

coming back to the 4-wire fan with PWM:

I just connected the blue wire (pwm control wire) to GPIO18 (pin 12), set in the cooler.py script: GPIO.PWM(12, 25000) 12 for the pin and frequency to 25kHz and here we go: works like a charm -so far.

Thanks for your help.

Cheers

Roland

Hi

The wiring is understood, no need for a Transistor or similar. The question is the 25 kHz. If I understood correctly, the 25 in the post you mentioned is Hz, not kHz.

Roland

Hi,

I would like to use a 4 wire fan (NF-A4x10 5V PWM) with pwm control. Do you think, the PWM frequency in the script could be set to 25kHz, which ist the required frequency for the PWM control?

Cheers

Roland