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Published on Jan 10, 2010
This is a Joule Thief Secondary replica of the famous Hairpin circuit described in the 1890's by Nicola Tesla. Of course Tesla did not use a transistor and a joule thief to make the voltage spikes. He used what he called a dd, or a disruptive discharge, which means a spark. He went into a great deal of detail to describe the ways he had found to overcome the problems of the dd. 2 of the problems he named are, the soot that needed to be polished off the sparking plates, and the unwanted sparks coming from the induction coil which was the main part of his generator. Since I read his descriptions, I have wanted to try the hairpin circuit using the joule thief secondary instead of the dd and "stout copper bars". In this video, I show my joule thief secondary version of this circuit. I show that with 1067 spiky volts issuing from a joule thief secondary, I am able to easily light 2 and almost 3 LoA 20-leds bulbs to full brightness using the parallel circuit Tesla described in 1891. These lights are called 40w equivalent, but I do not agree. They seem more like 20w equivalent, and so, 3 of these lights being lit by one joule thief will give the lighting effect of at least 50w filament bulb. I am sure with 1300 spiky volts this will be 3 bulbs to full brightness. I am pleased to show this. Thanks for watching. jeanna