Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Foo Off-Topic chit chat with no general subject.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-30-13, 10:30 PM   #1
no1mad
Thunder Whisperer
Thread Starter
 
no1mad's Avatar
 
Join Date: Apr 2008
Location: NE OK
Bikes: '06 Kona Smoke
Posts: 8,739
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 132 Post(s)
WiFi successor in development.

Saw this on my Google+ feed. It is shared publicly, so I'm just going to do a c & p so that those who don't have G+ accounts can see:



What's Hot and Recommended

Science
Shared publicly - 12:05 AM

Researchers beat fiber optic broadband speeds using visible LED light

High speed data is already being transmitted by visible light to the moon, so why not in your living room, too? After the Fraunhofer Institute showed off 3Gbps speeds with LED lights, researchers from five UK universities have managed to transmit data at 10Gbps using micro-LEDs with a technique they've coined "LiFi." The team was able to crack the barrier by combining 3.5Gbps streams in each of the red, green and blue frequencies that make up white light. Such a technique could one day work with existing light bulbs, promising higher speeds than current WiFi and increased security -- since visible light can't penetrate solid objects like walls. In addition, a single bulb could theoretically provide connectivity for up to four devices. For now, such devices are confined to the lab, but given the torrid pace of development, don't be surprised if your data connection is soon a click of the switch away.
Attached Images
File Type: jpg lifi.jpg (63.4 KB, 11 views)
__________________
Community guidelines
no1mad is offline   Reply With Quote
Old 10-31-13, 02:51 AM   #2
Artkansas 
Pedaled too far.
 
Artkansas's Avatar
 
Join Date: Oct 2005
Location: La Petite Roche
Bikes:
Posts: 12,858
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
I have to wonder how they correlate this with standard room lighting. Naively, I imagine pulsing light as the data passes along. That would seem disconcerting to me and I wonder if this might not give epileptics fits.
__________________
"He who serves all, best serves himself" Jack London

Quote:
Originally Posted by Bjforrestal View Post
I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.
Artkansas is offline   Reply With Quote
Old 10-31-13, 03:01 AM   #3
bikeguyinvenice
A tiny member
 
bikeguyinvenice's Avatar
 
Join Date: Feb 2012
Location: Riverview, Florida, U.S.A.
Bikes: 2013 Specialized Allez
Posts: 202
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
And how exactly will a beam of light be better than a radio signal? A beam of light is easily broken.
bikeguyinvenice is offline   Reply With Quote
Old 10-31-13, 10:39 AM   #4
no1mad
Thunder Whisperer
Thread Starter
 
no1mad's Avatar
 
Join Date: Apr 2008
Location: NE OK
Bikes: '06 Kona Smoke
Posts: 8,739
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 132 Post(s)
Quote:
Originally Posted by bikeguyinvenice View Post
And how exactly will a beam of light be better than a radio signal? A beam of light is easily broken.
A bit more secure? I can see applications in the home networking area, as the signal can't travel through the walls- nobody piggybacking on your network (though it should've been encrypted to prevent it).
__________________
Community guidelines
no1mad is offline   Reply With Quote
Old 10-31-13, 10:43 AM   #5
no1mad
Thunder Whisperer
Thread Starter
 
no1mad's Avatar
 
Join Date: Apr 2008
Location: NE OK
Bikes: '06 Kona Smoke
Posts: 8,739
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 132 Post(s)
Quote:
Originally Posted by Artkansas View Post
I have to wonder how they correlate this with standard room lighting. Naively, I imagine pulsing light as the data passes along. That would seem disconcerting to me and I wonder if this might not give epileptics fits.
In the early stages, sure. But what if the technology could progress to the level that it is akin to light therapy? Or possibly even to point where one could project emotion?
__________________
Community guidelines
no1mad is offline   Reply With Quote
Old 10-31-13, 11:18 AM   #6
genec
genec
 
genec's Avatar
 
Join Date: Sep 2004
Location: West Coast
Bikes: custom built, sannino, beachbike, giant trance x2
Posts: 24,779
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 462 Post(s)
Quote:
Originally Posted by no1mad View Post
A bit more secure? I can see applications in the home networking area, as the signal can't travel through the walls- nobody piggybacking on your network (though it should've been encrypted to prevent it).
That signal not traveling through walls though is the weak area... how is sister going to use this network in her bedroom while mom is using it downstairs, and little brother wants to use it in the garage? Light is line of sight... so you just took any area not in sight and put it out of reach.
genec is offline   Reply With Quote
Old 10-31-13, 11:28 AM   #7
Shimagnolo
Senior Member
 
Shimagnolo's Avatar
 
Join Date: May 2008
Location: Zang's Spur, CO
Bikes:
Posts: 7,561
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 168 Post(s)
Quote:
Originally Posted by Artkansas View Post
I have to wonder how they correlate this with standard room lighting. Naively, I imagine pulsing light as the data passes along. That would seem disconcerting to me and I wonder if this might not give epileptics fits.
Your TV set pulses image fields at 60Hz.
Ever heard of anyone getting an epileptic fit from it?
No, because it is too fast to see.
Now try to see something blinking 100,000,000 times that fast.
Shimagnolo is offline   Reply With Quote
Old 10-31-13, 11:35 AM   #8
Artkansas 
Pedaled too far.
 
Artkansas's Avatar
 
Join Date: Oct 2005
Location: La Petite Roche
Bikes:
Posts: 12,858
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by Shimagnolo View Post
Your TV set pulses image fields at 60Hz.
Ever heard of anyone getting an epileptic fit from it?
Um, yes. Photosensitive epilepsy.

And basically, the data rate of a TV is about 20,995,200 bps for each of the RGB channels,(720x486x60) the difference may not be that great.
__________________
"He who serves all, best serves himself" Jack London

Quote:
Originally Posted by Bjforrestal View Post
I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.

Last edited by Artkansas; 10-31-13 at 11:43 AM.
Artkansas is offline   Reply With Quote
Old 10-31-13, 12:06 PM   #9
genec
genec
 
genec's Avatar
 
Join Date: Sep 2004
Location: West Coast
Bikes: custom built, sannino, beachbike, giant trance x2
Posts: 24,779
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 462 Post(s)
Quote:
Originally Posted by Shimagnolo View Post
Your TV set pulses image fields at 60Hz.
Ever heard of anyone getting an epileptic fit from it?
No, because it is too fast to see.
Now try to see something blinking 100,000,000 times that fast.
Is this visible light or IR... you can't see IR. Oh but good point on the speed... at that rate it would look just like a dim light.
genec is offline   Reply With Quote
Old 10-31-13, 12:13 PM   #10
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
you know what I hate most about the remote control for the TV and PVR?

it uses IR, so requires line of sight to work.

okay, well that's not the only thing I hate most about it, and I have a massive list of grievances for these remote controls, but requiring LOS to work is a massive step backwards.


Best remote I've used thus far is the PS3 bluetooth remote, but that's only because I don't need LOS to use it.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 10-31-13, 12:55 PM   #11
genec
genec
 
genec's Avatar
 
Join Date: Sep 2004
Location: West Coast
Bikes: custom built, sannino, beachbike, giant trance x2
Posts: 24,779
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 462 Post(s)
Quote:
Originally Posted by AEO View Post
you know what I hate most about the remote control for the TV and PVR?

it uses IR, so requires line of sight to work.

okay, well that's not the only thing I hate most about it, and I have a massive list of grievances for these remote controls, but requiring LOS to work is a massive step backwards.


Best remote I've used thus far is the PS3 bluetooth remote, but that's only because I don't need LOS to use it.
The first remotes used audible tones... in fact as a kid I used to "fool" TV by jingling keys... then they came out with ultrasonic remotes... not sure why those were later abandoned... except perhaps that pets were bothered; then came IR. Don't know why RF wasn't used... today it is quite easy to go low power and spread spectrum for such a device... and perhaps more intense "house remotes" go that route. (I don't know...)
genec is offline   Reply With Quote
Old 10-31-13, 06:39 PM   #12
black_box
Fax Transport Specialist
 
black_box's Avatar
 
Join Date: May 2008
Location: chicago burbs
Bikes: '17 giant propel, '07 fuji cross pro, '10 gary fisher x-caliber
Posts: 926
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Quote:
Originally Posted by Artkansas View Post
I have to wonder how they correlate this with standard room lighting. Naively, I imagine pulsing light as the data passes along. That would seem disconcerting to me and I wonder if this might not give epileptics fits.
I don't think it has to be on/off. It could be changing the phase of the signal. Or even fancier for light, changing the polarization.
black_box is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:00 PM.