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Adapt your LED tea lights to run on “dead” batteries with this pretty holder!

Earlier this year, I created a circuit board for the classic “Joule Thief” circuit, which allows you to run small projects off of nearly-dead batteries (including AA, AAA, and CR2032). I’ve now combined that PCB with a 3D-printed holder for LED tea lights; with a few small modifications, the lights will now run off of “dead” batteries and can be switched on and off from the bottom of the holder. Let’s go!”

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