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The Joule Thief is an inexpensive DIY component you can add to your low-load circuits to steal the last bit of power from your source. A useful devise to boost the voltage of power generating devices (i.e. thermoelectric or solar energy generation) http://en.wikipedia.org/wiki/Joule_thief

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from Instructables.com

Schematic Diagrams

Schematic Diagrams: Joule Thief - use 2N4401 of BC337 transistor, the less will be brought as they can handle more amps

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from Instructables.com

Make a Joule Thief

Joule - on työn ja energian yksikkö. Tarkempaa selitystä: https://www.youtube.com/watch?v=N7VgxE3fNDA

from Instructables.com

Make a Joule Thief

from Instructables.com

Making A Simple Joule Thief (made easy)

Today I am showing you how to make a very simple joule thief. A joule thief has many applications, the best gadget that I made with was a "Water Powered Lamp", soon I'm going to post on a guide about it but first I need to post this guide. I used an iPhone 4S as my camera :)))  What Is A Joule Thief ? To simplify everything, a "joule thief" is a circuit that helps drive an LED light even though your power supply is low. What can we do with it? We can use it to squeeze...

The Joule Thief: A prepper's best friend for dead or homemade batteries. Learn how to take a few cents worth of parts (or scrounge them from dead electronics) and make a circuit that can make dead batteries work again.

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