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Low-Cost sensing and communication using bidirectional LEDs

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Now _this_ is a really cool project – using a LED display bidirectionally to optically detect finger touches! [via] Link & extremely cool video here.

Related – LEDs as sensors blog.

2 thoughts on “Low-Cost sensing and communication using bidirectional LEDs

  1. That is a really neat application. I wonder why nobody has done it before now… I didn’t read it 100% through, but the PDF didn’t seem to show anything in there that hasn’t been around for a long time…
    I wonder how long until someone makes a keyboard with this concept.

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