Is there a way to switch on and off the arduino with a simple button and a transistor? I came out with the following schematic (attachment). (on) Would be an output PIN of VCC when the arduino starts (so you don't need to keep pressing the button, because the arduino does that job) (off) Would be…

Transistor + Arduino (Extream sleep mode of 0mA)

CrossRoads April 9, 2014, 10:02pm 5

If you use P-channel MOSFET, the base is voltage driven, current is very very low.

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