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Monday, April 16, 2012

Joule Thief

Joule Thief is a circuit that can step up the voltage of an battery and power a white LED. You can step up the components to make higher voltage. The circuit is fairly simple it contains one NPN transistor ,1K resistor, and a ferrite coil(1 LED, almost forget).
Here is the schematic:

Simple Joule Thief circuit

1 comment:

  1. Here is a pictorial diagram of how a Joule Thief looks.
    http://rustybolt.info/wordpress/?p=128

    ReplyDelete