Controlling speed of DC fan with PWM? - Raspberry Pi Forums

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would similar setup work, instead of using 5v + g on controller (it's 12 volt fan, i'll have check ma draw tonight), using original wall plug power supply, or different power supply work? in other words, resistor, transistor, diode connected rpi pwm gpio pin, collector/emitter wiring going separate power supply?

https://learn.adafruit.com/adafruit-ard ... tors/parts
https://learn.adafruit.com/adafruit-ard ... ransistors

5 v work ened give twist
run slower


raspberrypi



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