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For the term "how to make joule thief without ferrite toroid".

3 Ultrabright Leds Powered By Joule Thief Ferrite Bead Circuit

This is a video of 3 LEDs (2-265000 MCD and 1-26500 MCD 10 mm Ultra brights)running from a single AA battery. Each LED requires between 4 and 4.5 vdc and over 100 mA’s each to light. For more info, see overunitydotcom in the Joule thief topic. This is …

Joule Thief Lights 300 LEDs On Single AA Battery!!

My modified Fuji AA Joule Thief circuit lighting 300 LEDs! Each LED requires 3.5 volts to light. I am still using the old AA battery that you have seen in all of my other videos. For more information, go to Overunitydotcom in my Joule Thief topic. Thanks.