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How to create a Joule Thief (old battery)

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Published on Aug 6, 2010

By making a simple circuit, old batteries can be used for lighting!
The circuit's name is Joule Thief, and is made up from only 3 simple components, the old battery and a bright LED.

The old battery gives under 1 volt instead of 1.5, and it is useless for most electric devices.

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