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What if I don't need light right now? Can LEDs transmit data at levels a human eye can't see, so as to not irritate us under day light? Also, could lightbulbs
by mojuba 11y ago
What if I don't need light right now? Can LEDs transmit data at levels a human eye can't see, so as to not irritate us under day light?
Also, could lightbulbs have IR transmitters alongside the ordinary light, again so as to not depend on the visible light?
- fnordfnordfnord 11y agoI've seen a demo of that. I can't remember where at the moment. IIRC they don't need to resort to using IR, they can just use such low intensity of light that it isn't perceptible by people. Not sure if this can currently be accomplished in bright sunlit locations though.
- kerny 11y agoI saw it in TED talk http://www.ted.com/talks/harald_haas_wireless_data_from_every_light_bulb http://www.ted.com/talks/harald_haas_wireless_data_from_ever...