Sunday, September 11, 2016

How to make a hand crank flashlight

This looks like a fun project. I think it works so well, or at least, seams to in the video because LEDs are so damn efficient. I would make it somewhat differently, but this is good. For one thing, I’d probably make it out of an LED flashlight, swapping out the batteries for a motor.

source http://scienceblogs.com/gregladen/2016/09/11/how-to-make-a-hand-crank-flashlight/

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