Monday, March 10, 2014

Invisible Spy Beacon / Infrared LED Throwie

Spies need ways to secretly communicate with their partners. This can be a simple signal like a chalk mark on a wall or a newspaper left on a park bench. But the best kind of signal is completely invisible. In this project, I am going to show you how to make a simple invisible beacon that you can use to signal your friends and accomplices.

For step by step instructions, check out the Instructable:

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