Make a Joule Thief

Make a Joule Thief: "Yes, it's the infamous Joule Thief, in Instructable form! For those of
you who don't know, the Joule Thief is a tiny little circuit that allows
you to drive a white or blue LED from voltages as low as 0.5 volts. You
think those batteries are dead? Don't throw them out yet! Hook them up
to the Joule ...
By: 1up

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