LEDs and Solar cells in place of tubes and FETs?

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At the time, there were no alternative light sources fast enough for the task, so they just used what they had and learned how to escape the pitfalls. IMO, trying to adapt this technology is akin to making a 21st-century steamcar
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Aren't tube mics 21st-century steamcars? Not cutting edge tech by any means, but we like how they sound so we still do it.

I'm interested in optotransmitters not because they're new (although I admittedly knew little about their history), but rather because I'm curious how they sound. I'm curious about what quirks they might imprint on the audio signal and how a light-based system would respond to saturation.
 
This guy, he posted the same thing on gearslutz.

anyways, it wont work in base band audio. there is too much noise in analogue.  Digital would be a different story. (that is why the presentation works btw)

and if you could ideally build a n ideal solar cell opti-coupler it would most likely have an expansion effect and not a limiting effect as a transformer core saturation. Anything above and beyond the light source on the audio would wash out the signal. and since a solar cell is dc it would be like rectifying the signal. you might modulate it with FM (like fiber media and laser microphones), but the mixer noise would come into play,

now I could see a solar cell could be used to manipulate the CV in a compressor, but not for anything else.
I don't know why anyone would need to clean up phantom power either, and the OP comment really wants me to raise the BS flag really high on that subject.
 
> "A breakthrough new kind of wireless Internet"

Lab data-transfer demonstration:
http://www.designntrend.com/articles/65606/20151129/will-li-fi-replace-wi-fi-or-join-it.htm

Company:
http://velmenni.com/#jugnu

Critique:
http://techcrunch.com/2015/11/29/li-fi-probably-wont-be-the-new-wi-fi-for-most-people/

BBC article:
http://www.bbc.com/news/technology-34942685

Prof Haas' idea has NO relation to microphones. (Even if all mikes go all-digital, we are not likely to want such a lamp on every mike.)
 
drtechno said:
This guy, he posted the same thing on gearslutz.

anyways, it wont work in base band audio. there is too much noise in analogue.  Digital would be a different story. (that is why the presentation works btw)

and if you could ideally build a n ideal solar cell opti-coupler it would most likely have an expansion effect and not a limiting effect as a transformer core saturation. Anything above and beyond the light source on the audio would wash out the signal. and since a solar cell is dc it would be like rectifying the signal. you might modulate it with FM (like fiber media and laser microphones), but the mixer noise would come into play,

now I could see a solar cell could be used to manipulate the CV in a compressor, but not for anything else.
I don't know why anyone would need to clean up phantom power either, and the OP comment really wants me to raise the BS flag really high on that subject.
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I don't mean to offend anyone and I don't claim to know what I'm talking about.

I am just a curious musician. My science background is in medicine and physics. My electrical engineering knowledge is rusty at best. I have just recently begun playing with old electronics for fun.

So I posted what I thought was an interesting concept to a couple of forums where people know more about electronics than I do, in the hopes that I might better my knowledge of how mics work.

Thank you to everyone who has posted information and links! It has been great reading.
 
Same month as TED:

"Disney Research have taken LED-based comms a step further, adding a Linux TCP/IP network stack to a consumer lamp."
http://www.theregister.co.uk/2015/09/14/disneys_lightbulb_moment_iot_comms_in_led_lamps/

http://www.disneyresearch.com/publication/Linux-Light-Bulbs/

Very slow and short-range.
 
PRR said:
Very slow and short-range.
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Somebody posted a totally-nontechnical story about "LiFi" to the Facebook, and when i read it, the first thing that came to mind was, "wake me up when it goes through walls."

=a
 

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