High voltage joule theif with center trapped transformer

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In this video I make a high voltage joule thief and test it out!
Parts:
2N3904 - https://goo.gl/xMtAKm
Power Supply - https://goo.gl/j01Tx6
Transformer - https://goo.gl/mk7OzQ OR you can scavenge one, the lower output voltage the better, we want a higher input to output ratio.
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