Hi, I thought I would be able to very quickly set up a GPIO-driven PWM controller for a fan using something like this... int PWMOUT = 10; void setup() { pinMode(PWMOUT, OUTPUT); // PWMOUT pin as output } void loop() { while(1) { digitalWrite(PWMOUT,HIGH); delayMicroseconds(20); digi…

25Khz PWM with digitalWrite...

terryking228 May 2, 2018, 4:57pm 2

Hi,

The fan motor probably is not highly sensitive.

Maybe try the available 31372.55 Hz PWM

See: Arduino-PWM-Frequency - ArduinoInfo for all the possible settings..

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