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| Topic: | Li-Fi? This thread has 3 replies. Displaying all posts. |
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| Post 1 made on Monday September 14, 2015 at 13:25 |
studiocats1 Long Time Member |
Joined:
Posts: | February 2003
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| Post 2 made on Monday September 14, 2015 at 13:27 |
jimstolz76 Loyal Member |
Joined:
Posts: | December 2007
5,607 |
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This presentation was given in 2011: [Link: ted.com]
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| Post 3 made on Monday September 14, 2015 at 13:57 |
Ernie Gilman Yes, That Ernie! |
Joined:
Posts: | December 2001
30,104 |
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That's really interesting! This looks like it has real possibilities, though as with any new technology, there are some possible drawbacks to work through.
Multiple transmitters in the same area would probably interfere with one another at the receiver. It will be hard, might be impossible, to distinguish two simultaneous bitstreams. This is much less the case with RF.
A constantly ON, very bright LED would compete at the receiver for intelligibility, just as an IR command can't be received by an IR sensor that's being flooded with IR from a plasma or an LCD TV that's just been turned on.
If no competing signal is present, a single LED light bitstream, flowing downward in a room, could be sensed through a window, especially if it happens to light up a nearly sheer curtain a little bit. There WILL be devices made to pick up very low level bitstreams.
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A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw |
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| Post 4 made on Monday September 14, 2015 at 20:38 |
KeithDBrown Long Time Member |
Joined:
Posts: | December 2013
418 |
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But are they dimmable?
Follow-up question. Does dimming the lights reduce available bandwidth or just the range?
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