Hello, Besides an raduino board I have a 3v 600mA power source and a 3v 350mA high power LED. I plan to run the led at 2.5v only and 200mA using PWM. Not sure if 2n2222a is okay to drive the LED, would it run hot? From what I have read I can't use any MOSFET i.e. IRF510 or 2n7000 due insufficient …

PWM 3V 200mA High Power Led from 3v soure

system March 18, 2013, 9:28pm 5

I would definitely use current limitation, at this moment my concern is how to PWM drive it from the 3V source.

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