The perfect night-light, and a great way to learn how to solder.Designed by MakersBox, Ships from United States of America
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The Joule Thief is a clever little circuit that can light a LED with a battery that is nearly dead. It does this with a pair of opposing magnetic fields. I like this circuit because it is simple to...Read More…
The Joule Thief is a clever little circuit that can light a LED with a battery that is nearly dead. It does this with a pair of opposing magnetic fields. I like this circuit because it is simple to build, yet demonstrates some very complex electrical behavior.
I've designed a printed circuit board to help make this easier to build for beginning Makers. I used open source KiCAD software to lay it out (a future Instructable?), and OSHPark to manufacture it. If you want to just wire one up without the board, check out Angelo's Instructable which uses essentially the same circuit.
If you want to learn a bit more about the principles that make this circuit work, check out this video: http://youtu.be/0GVLnyTdqkg
The kit contains:
Not sure about making a kit? We've made it as easy as possible to assemble. Check out the detailed instructions at Instructables.com:
William | May 27, 2019
Patrick | Aug. 2, 2016
Michael | April 7, 2016
Rick | Nov. 23, 2015
Darrell | Oct. 19, 2015
Gwendolyn | March 17, 2015
Roger | Feb. 10, 2015
Josh | Jan. 12, 2015
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