Make cheap magnetic LEDs for fun graffiti projects

Posted by Mark Frauenfelder, February 14, 2006 5:49 PM |
The Make blog has an item about "LED Throwies," made by a group with a wonderful name: Graffiti Research Lab.
200602141748 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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