How does a fan regulator ?

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barryforever

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Here is a silly doubt that crept in my mind...
Like how does a fan regulator work ?
is it like a potentiometer ?
can it control current delivered to the fan or does it control ac voltage
 

what kind of fan ?
If you mean a PC fan there is a micro controller that drive a brushless motor.
If you talk about a big dc motor, search on google for triac variator
 

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well it goes to a heater i want to vary the heaters output ...
im unsure the regulator controls the voltage or current
 

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