Hello !
I have read lots of post about controlling a common 12v fan with the 3rd yellow pwm pin
and tried all of them without success. All the time the fan was spinning at 100%
I either do something wrong or my fans are failed.
I use common ground of 12v psu for fan and for arduino, then I connect the yellow (signal) wire of fan to digital pin of the arduino according to the code, and nothing happens again...
For instance, if use
void loop()
{ digitalWrite(7,LOW); }
it should stop spinning , right ?
Please help.. give me some guidance, thank you !