I built a simple project with my son. It's sort of a nightlight where four led's are connected to the Arduino via a breadboard and there's a button attached to it. He pushes the button and the lights go on and again and the lights go off. I figured the LED didn't use much power so it could be run of…

Battery drain when LED's are off

system November 6, 2012, 9:34pm 6

Sounds like what you want is this:

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