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For the term "joule thief freq adjust".

Amazing Joule Thief Lights 200 LEDs On A Single AA Battery!!

Avast!!!! Lighting 200 LEDs on a single AA battery using the modified Fuji Joule Thief circuit. The battery, which is old and nearly dead, will not even light 1 single led by itself. A new AA battery will not light one of these leds alone. More to come…

Joule Thief Lights 400 Leds On Single AA Battery!

My modified Fuji AA Joule Thief circuit illuminating 400 leds using an old AA battery for power. For more info go to Overunitydotcom in the joule thief topic. Thank you. This is NOT free energy but it is a very efficient circuit that I can use to obtai…

Two Joule Pirates In Parallel (Joule Thieves)

This is two Joule Pirates (Joule Thieves) wired in parallel running off of one AA battery powering a 48″ tube. (40 watts) The funny thing is that the tube is brighter with just one circuit turned on than with my single circuit experiments from before. …