Over dinner, my son (3rd grade) talked about a video they watched at school about a young girl who invented a flashlight that worked by the heat of your hand. I later found the video here: http://www.youtube.com/watch?v=9CCGUMkcbjg. Big congrats to her, way to go!
Later, at home I pulled out the peltier plate I got for the Frankenstein project (not as sinister as it sounds) and hooked it up to my multimeter. The peltier plate is a component that will convert a heat difference between the two sides into electricity. This is the principle the young lady used to power her flashlight.
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Simple Setup - Multimeter leads clipped to peltier leads |
The kids then took turns putting their hand on the plate and watching the voltage change.
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Ok, so not my kid's hand. Consider this a reenactment. |
A simple learning moment that only required one electrical component and a multimeter.
P.S. Yes the voltage in the picture is negative, flip the plate over or flip the leads if that matters to you.
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