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For the term "two ic 555 circuit verses joule thief circuit".

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.

Solar Joule Thief HEWEY Boxed

This is the ‘Automatic Solar Joule Thief’—-“Hewey”–boxed. The device is a simple Joule Thief LED/charger circuit with an automatic solar charger attached. It uses super capacitors instead of batteries to store the energy. “Hewey”…