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83% OFF 40x40mm Thermoelectric Power Generator Peltier Module TEG High Temperature 150 Degree US$2.00 US$11.99 View It

Overall:

Geiger 18/05/2017

This is a great unit but it's output as a voltage generator is not what is presented in the description. I have put large temperature differences across the unit and it never generates a voltage over about 0.8V. I needed 2 units in series to power a 5V boost converter. Once the converter triggered, the thermoelectric device did a great job of powering it and an attached LED lamp for a long time. These are high quality units, but do not generate the voltages described. In the picture, I used a ice pack and a microwaved sock full beans to create the temperature difference.

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