LED Throwies

Here’s a neat little project that anyone can do: make battery powered magnetic LED “throwies” that can be thrown and stuck to any ferromagnetic surface in your neighbourhood.

A throwie is made from a 10mm diffused LED, a small lithium battery, and a rare-earth magnet all taped together. They cost about $1 to make and the batteries last about a week.

throwies (LED magnets)

Instructables has a page of step-by-step instructions to make your own throwies.

Also, check out throwies in action.

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