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The Best of Instructables Volume I by The editors at MAKE magazine and Instructables.com

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LED Throwies image

LED Throwies are an inexpensive way to add color to any ferromagnetic surface! By Q-Branch

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Figure A: That’s a lot of Throwies!

Developed by the Graffiti Research Lab (graffitiresearchlab.com) a division of the Eyebeam R&D OpenLab (research.eyebeam.org), LED Throwies are an inexpensive way to add color to any ferromagnetic surface in your neighborhood. A Throwie consists of a lithium battery, a 10mm diffused LED and a rare-earth magnet taped together. Throw it up high and in quantity to impress your friends and city officials.

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