Can someone tell how I would size a potentiometer for a circuit to
control a simple 12v fan ( ex pc).
Fan - Roughly 12vdc/ 0.15A/ 1.8Watts
Input Power - Old movile phone charger - 6v upto around 12v DC
depending on model I find in the garage.
Am making a magnetic stir plate and using the fan with a couple of
magnets stuck onto it as the main drive unit
Thanks for your help
Ged.
Is this any good to you? http://brewiki.org/StirPlate


If you want to control fan speed why not use one of these?