(help) Control a 3-pin PC fan

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hello !
i have read lots of post controlling common 12v fan 3rd yellow pwm pin
and tried of them without success. the  time fan spinning @ 100%

i either  wrong or fans failed.


i use common ground of 12v psu fan , arduino, connect yellow (signal) wire of fan digital pin of arduino according code, , nothing happens again...

for instance, if  use 

void loop()
{  digitalwrite(7,low);  }

it should stop spinning , right ?

please help.. give me guidance, thank !

i try analog write. think digital wright not work application has states high/low. try controlling servo. 


best of luck!


Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > (help) Control a 3-pin PC fan


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