Face & Voice of a Joule Thief

This is Kubikop’s ‘Joule Thief’ charging light circuit that I replicated. Here I show what the signal from the transistor looks like on an oscilloscope. This pulse is what is doing the work of lighting the LED lights and charging the second battery. I also use a small radio to listen to the sound of the “Thief”.

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self running joule thief circuit

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