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High Voltage Joule Thief

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Description

Simple circuit to power a 120v Neon Lamp with 2 AAA batteries(2.5v or 3v). (1) toroid, (1) 200 Ohm resistor, neon lamp, 165 turns of 30ga wire, 10 turns of 24ga wire with a center tap at 5 turns to battery positive. Emitter to battery negative. Collector to resistor to primary coil. 2N3904 NPN type transistor

Here is a very nice tutorial of the circuit:

My HV joule thief uses a 200 ohm resistor instead of the one shown at the link below, and the # of turns/wire size of mine is different. Make sure the center tap of the coil goes to the battery positive. The schematic at the link below may not show that correctly.

http://www.instructables.com/id/high-voltage-joule-thief/

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