|
Register | Sign In |
|
QuickSearch
EvC Forum active members: 65 (9162 total) |
| |
popoi | |
Total: 915,817 Year: 3,074/9,624 Month: 919/1,588 Week: 102/223 Day: 0/13 Hour: 0/0 |
Thread ▼ Details |
|
Thread Info
|
|
|
Author | Topic: Transmission of data by LED light | |||||||||||||||||||||||
New Cat's Eye Inactive Member |
I haven't watched the video cause its too long to watch at work...
But how would my lightbulbs receive the information?
|
|||||||||||||||||||||||
fearandloathing Member (Idle past 4145 days) Posts: 990 From: Burlington, NC, USA Joined: |
Again the light limits the broadcast to improve security issues. Is security an issue? Economically I would say that this wouldn't be a good selling point. There are many things you can do to achieve secure comms other ways that don't rely on new tech. If you were looking for secure data transfer then lasers would be where I would look. I think DARPA has already been down this road with using lasers for comms with subs. It is a novel idea, nothing more. One I am sure others have thought of...but I am not up to a patent search. "No sympathy for the devil; keep that in mind. Buy the ticket, take the ride...and if it occasionally gets a little heavier than what you had in mind, well...maybe chalk it off to forced conscious expansion: Tune in, freak out, get beaten." Hunter S. Thompson Ad astra per aspera Nihil curo de ista tua stulta superstitione.
|
|||||||||||||||||||||||
fearandloathing Member (Idle past 4145 days) Posts: 990 From: Burlington, NC, USA Joined: |
Communication is limited to the speed of the slowest link and light is line of sight and subject to medium degradation. It will be more limited by the transmission system prior to it being turned into light. It is a moot point with power lines being the main route of data transfer, you can't exceed their usable bandwidth."No sympathy for the devil; keep that in mind. Buy the ticket, take the ride...and if it occasionally gets a little heavier than what you had in mind, well...maybe chalk it off to forced conscious expansion: Tune in, freak out, get beaten." Hunter S. Thompson Ad astra per aspera Nihil curo de ista tua stulta superstitione.
|
|||||||||||||||||||||||
jar Member (Idle past 394 days) Posts: 34026 From: Texas!! Joined: |
That is what I said. It is the part before becoming light that will be the limiting factor.
And the power grid in the US is not all that up to date.Anyone so limited that they can only spell a word one way is severely handicapped!
|
|||||||||||||||||||||||
crashfrog Member (Idle past 1467 days) Posts: 19762 From: Silver Spring, MD Joined: |
Still needs to get from A to B and then back to A for the information to be useful/used. Not necessarily. Unidirectional digital networks still have some uses; for instance, car radios can get station/artist/song information now. That's a kind of unidirectional network that we know better as a "broadcast." LED networks could have use as a kind of near-field broadcast system, particularly since it's fairly easy to tune out unwanted transmissions by blocking line of sight or filtering colors. There's a lot of different kinds of networks besides the packet-switching type that everybody is thinking of.
|
|||||||||||||||||||||||
crashfrog Member (Idle past 1467 days) Posts: 19762 From: Silver Spring, MD Joined: |
But how would my lightbulbs receive the information? Who says it has to?
|
|||||||||||||||||||||||
fearandloathing Member (Idle past 4145 days) Posts: 990 From: Burlington, NC, USA Joined: |
Here is a little more on the subject. Seems there is a lot more interest in this technology than I thought, many or them would have to do with not wanting RF in certain places, planes, operating rooms...
quote: From here... The weak link seems to be currently it would have to use some other type of connection for the up-link. That could be overcome with a purpose built bulb that would incorporate a photo-detector I am sure. It seems like this would be best suited to power companies who provide BPL service, as far as consumer use goes."No sympathy for the devil; keep that in mind. Buy the ticket, take the ride...and if it occasionally gets a little heavier than what you had in mind, well...maybe chalk it off to forced conscious expansion: Tune in, freak out, get beaten." Hunter S. Thompson Ad astra per aspera Nihil curo de ista tua stulta superstitione.
|
|||||||||||||||||||||||
Annafan Member (Idle past 4579 days) Posts: 418 From: Belgium Joined: |
Once it starts to transmit information, people will get sick of it. How long before some people will acquire a "LED sensitivy syndrome" that causes CFS?
|
|||||||||||||||||||||||
fearandloathing Member (Idle past 4145 days) Posts: 990 From: Burlington, NC, USA Joined: |
CFS? I can't find any link between Chronic Fatigue Syndrome and light or better yet modulated light.
quote: From here... It seems they don't know much about it, yet you suggest a new, relatively untested technology may cause/contribute to CFS? I would suggest that it more likely to cause seizures in people who have epilepsy, we know modulated light can do this already."No sympathy for the devil; keep that in mind. Buy the ticket, take the ride...and if it occasionally gets a little heavier than what you had in mind, well...maybe chalk it off to forced conscious expansion: Tune in, freak out, get beaten." Hunter S. Thompson Ad astra per aspera Nihil curo de ista tua stulta superstitione.
|
|||||||||||||||||||||||
crashfrog Member (Idle past 1467 days) Posts: 19762 From: Silver Spring, MD Joined: |
It seems they don't know much about it, yet you suggest a new, relatively untested technology may cause/contribute to CFS? She's referring to the people who claim to have "wifi sensitivity syndrome" or whatever; they claim to have CFS-like symptoms that are exacerbated by the transmissions from wifi devices (and sometimes cell phones.) It's been on the news recently because people who imagine that they suffer from this are moving to the United States National Radio Quiet Zone in West Virginia, a 13,000 square-mile zone where such radio transmissions are forbidden by law (to avoid scrambling the reception of the Green Bank Radiotelescope.) Anything new, and some people will imagine that they're "allergic" to it. For instance, MSG. (There has never been a recorded case of MSG allergy but I imagine you probably know people who think they're allergic to it.)
|
|||||||||||||||||||||||
ramoss Member (Idle past 612 days) Posts: 3228 Joined: |
I don't know if it could be considered an allergy, but I do know several people who have to avoid it because it often triggers migraines.
|
|||||||||||||||||||||||
fearandloathing Member (Idle past 4145 days) Posts: 990 From: Burlington, NC, USA Joined: |
I don't know if it could be considered an allergy, but I do know several people who have to avoid it because it often triggers migraines. Just WiFi? As a radio enthusiast I find that hard to believe. Microwave ovens, some cordless phones, baby monitors, amateur radio, Bluetooth....the list goes on...all use the 2.4GHz band. Your friend would have a perpetual headache if this were true. Most people never stop to consider how much RF you are exposed to all day. If you had access to a RF spectrum analyzer you might be shocked at the amount of RF you are currently sitting in, especially if you live in an urban area. "No sympathy for the devil; keep that in mind. Buy the ticket, take the ride...and if it occasionally gets a little heavier than what you had in mind, well...maybe chalk it off to forced conscious expansion: Tune in, freak out, get beaten." Hunter S. Thompson Ad astra per aspera Nihil curo de ista tua stulta superstitione.
|
|||||||||||||||||||||||
nwr Member Posts: 6408 From: Geneva, Illinois Joined: Member Rating: 5.1 |
Just WiFi?
I'm pretty sure that comment was meant to be about MSG, not about WiFi.Fundamentalism - the anti-American, anti-Christian branch of American Christianity
|
|||||||||||||||||||||||
fearandloathing Member (Idle past 4145 days) Posts: 990 From: Burlington, NC, USA Joined: |
LOL, Thanks
That makes much more sense, I am a moron more often than not. (probably from exposure to high levels of RF) I can see it maybe screwing with your blood pressure and causing headache, I try to avoid salt and msg in food I buy. Edited by fearandloathing, : No reason given."No sympathy for the devil; keep that in mind. Buy the ticket, take the ride...and if it occasionally gets a little heavier than what you had in mind, well...maybe chalk it off to forced conscious expansion: Tune in, freak out, get beaten." Hunter S. Thompson Ad astra per aspera Nihil curo de ista tua stulta superstitione.
|
|||||||||||||||||||||||
ramoss Member (Idle past 612 days) Posts: 3228 Joined: |
I did mean msg. Allergic to wi-fi... Hardly.
Florecent lights can cause headaches with some people.. I am sure they are stocking up on the incandecent bulbs..
|
|
|
Do Nothing Button
Copyright 2001-2023 by EvC Forum, All Rights Reserved
Version 4.2
Innovative software from Qwixotic © 2024