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Low-Cost Sensing and Communication Using Bi-directional LEDsThis technical paper from Mitsubishi explains how LEDs can be used as input devices, to sense the light from other LEDs. It's not for the beginner, but it's a straightforward read for those who understand electronics and microprocessors, and it details a useful sensing technique that's cheap. Thanks to Christine Brumback and John Bergren for the link. Posted by tigoe at October 14, 2004 07:32 AM |