Hi all, As part of a bigger surface mount project, i need to use transistor/ mosfets to switch 5 LEDs in parallel on or off. I am not totally familiar with transistor/ mosfets. The 5 LEDs peak at 400mA and are powered by 3.7V lipo battery. I will use a single Arduino pin to turn the LEDs on or off…

p-channel mosfet switching circuit

knut_ny May 13, 2014, 12:58pm 8

This can burn the LEDs. => Add 47..100 Ohm i series with each LED

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