Newbie level 3
I want to create a PWM for the cooling fan in my car. The fan I have installed is WAY loud and i want to be able to turn it into something more like a 3 speed unit and not waste power by just using resistors. The fan pulls about 30 to 40 Amps and 12 to 14 volts. What PWM design would be he best for this type in installation?