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Hi all,
I am planning to install two Peltier tiles( TEC-12706 ) to an electric toothbrush which runs solely on the heat of human hand. I have tested the tile and it can generate about 150 millivolts, which is not sufficient to power a 12V DC electric motor. I think I should get a transformer or try to build a Joule Thief to amplify the voltage of the tile to 6V ( which is quite adequate to have a considerable RPM to brush your teeth ). Or Any recommended devices or components to amplify the low voltage? Thanks!
 

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no way you will get enough POWER (volts * amps) from a joule thief or anything you would want to hold near your mouth to run a toothbrush effectively. When you increase the voltage, you will reduce the current (and other losses).

step 1, measure the power of the motor under load (use a vom to measure current and load).

step 2, look at the power available from the power source.

It aint gonna happen with hand heat. Maybe if you were in an atmosphere near absolute zero, but I think I'd rather brush manually than die.
 
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