Tinman’s Ultra Low Voltage Led Driver

This shows an led driver circuit by Tinman that can operate at a voltage below the rated switching voltage of the transistor. I show how it can be jump started by using a small electrostatic jolt to the transistor base circuit. Once it starts the oscillator uses a transformer effect to step up the input voltage high enough for switching. Most Joule Thief type circuits stop functioning at around .5 volts. This one will keep going on less than .2 volts.
Here is the link to the forum discussion going on about the operation these type circuits:
http://overunity.com/8341/joule-thief-101/270/

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