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Charge Your Cellphone Using Wasted Heat (and Build a Steampunk Wall-E)

Step 20Assemble thermogenerator

Assemble thermogenerator
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We needed a minimal of 3 volts to power the microcontroller and decided to used two peltiers units instead of one. If you plan to skip that and just have one peltier you can, but it would be harder to reach 3 volts (remember, peltier units are not as good at generating electricity as seebeck units are).



A easy way to make a heatsink is to use the top cover of an altoids tin. We attached our cover to the peltier with mini binder clips. We added some thermal grease between the cover and the peltier. To make sure the cold side is cool enough we put 1 ice cube on top of the cover. The ice cube melts so don't put more than one; the tin can't hold that much water and it will spill when the ice melts.
The two Peltiers are attached in series.
(make sure the hot side is facing down)
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Author:splitreaction
Split Reaction, now known as Cunning Turtle, is a group of DIYers, artists, writers, engineers and photographers based in the NY state region.