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Germanium "Joule Thief" last Life

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Published on Apr 13, 2008

I built the Joule Thief circuit using a vintage PNP germanium transistor (2N1373). These transistors have a lower junction voltage and can run down to .2 volts. The video shows the last bit of energy lighting the white led to .208 volts. Because it is a PNP, reverse the regular circuit's battery and led polarity.

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