Forget Wi-Fi, boffins get 150Mbps Li-Fi connection from a li

D

Don McKenzie

Guest
Forget Wi-Fi, boffins get 150Mbps Li-Fi connection from a lightbulb

Scientists in China are reporting great success in replacing traditional Wi-Fi radio traffic with Li-Fi, a system that
uses the light signals from an LED lightbulb to provide a line-of-sight data stream.

Li-Fi, or light fidelity, was developed by Professor Harald Haas at the University of Edinburgh, who was disenchanted
with radio as a data transmission tool. Using light instead of radio opens up 10,000 times more available spectrum than
radio – and it's highly energy efficient compared to radio towers that use most of their power for cooling and only five
per cent for data transmission.

Read the full story at:
http://www.theregister.co.uk/2013/10/18/forget_wifi_chinese_boffins_get_150mbps_lifi_connection_from_a_lightbulb/

also:
http://www.slashgear.com/302172-19302172/
http://www.bbc.co.uk/news/technology-24579776
http://en.wikipedia.org/wiki/Li-Fi


--
Don McKenzie

All Olimex products now 30% off normal Olimex Prices.

$25 for an Olinuxino Linux PC:
http://www.dontronics-shop.com/olinuxino.html

The World's Cheapest Computer:
DuinoMite the PIC32 $20 Basic Computer-MicroController
http://www.dontronics-shop.com/the-maximite-computer.html
Add VGA Monitor/TV, and PS2 Keyboard, or use USB Terminal
Arduino Shield, Programmed in Basic, or C.
 
"Don McKenzie" <5V@2.5A> wrote in message
news:bcj1lrFk4fdU1@mid.individual.net...
Forget Wi-Fi, boffins get 150Mbps Li-Fi connection from a lightbulb

Scientists in China are reporting great success in replacing traditional
Wi-Fi radio traffic with Li-Fi, a system that uses the light signals from
an LED lightbulb to provide a line-of-sight data stream.

Li-Fi, or light fidelity, was developed by Professor Harald Haas at the
University of Edinburgh, who was disenchanted with radio as a data
transmission tool. Using light instead of radio opens up 10,000 times more
available spectrum than radio – and it's highly energy efficient compared
to radio towers that use most of their power for cooling and only five per
cent for data transmission.

Read the full story at:
http://www.theregister.co.uk/2013/10/18/forget_wifi_chinese_boffins_get_150mbps_lifi_connection_from_a_lightbulb/

also:
http://www.slashgear.com/302172-19302172/
http://www.bbc.co.uk/news/technology-24579776
http://en.wikipedia.org/wiki/Li-Fi


--
Don McKenzie

All Olimex products now 30% off normal Olimex Prices.

$25 for an Olinuxino Linux PC:
http://www.dontronics-shop.com/olinuxino.html

The World's Cheapest Computer:
DuinoMite the PIC32 $20 Basic Computer-MicroController
http://www.dontronics-shop.com/the-maximite-computer.html
Add VGA Monitor/TV, and PS2 Keyboard, or use USB Terminal
Arduino Shield, Programmed in Basic, or C.
Click to expand...

Must be the wireless world's equivalent of the fibre optics.
 
On Mon, 21 Oct 2013 08:52:58 +1100, Don McKenzie wrote:

> Li-Fi,

Needs line of sight.
 
On Mon, 21 Oct 2013 21:39:08 +1100, SolomonW <SolomonW@citi.com>
wrote:

On Mon, 21 Oct 2013 08:52:58 +1100, Don McKenzie wrote:

Li-Fi,

Needs line of sight.
Click to expand...

Yeah tou have to look at the laser
--
Petzl
I started with nothing and I am proud to say I still have most of it left
 
On 21/10/2013 7:20 PM, Petzl wrote:
On Mon, 21 Oct 2013 21:39:08 +1100, SolomonW <SolomonW@citi.com
wrote:

On Mon, 21 Oct 2013 08:52:58 +1100, Don McKenzie wrote:

Li-Fi,

Needs line of sight.

Yeah tou have to look at the laser
Click to expand...

yeah, with your remaining good eye.
 
"Glenn B" <not_glenn@nowhere.com> wrote in message
news:a4qdnXyWysxnhPjPnZ2dnUVZ_tCdnZ2d@westnet.com.au...
On 21/10/2013 7:20 PM, Petzl wrote:
On Mon, 21 Oct 2013 21:39:08 +1100, SolomonW <SolomonW@citi.com
wrote:

On Mon, 21 Oct 2013 08:52:58 +1100, Don McKenzie wrote:

Li-Fi,

Needs line of sight.

Yeah tou have to look at the laser


yeah, with your remaining good eye.
Click to expand...

Well.....that's pretty good information. ;-)

>
 
"Rod Speed" <rod.speed.aaa@gmail.com> wrote in message news:bcl6u6F3dtgU1@mid.individual.net...
SolomonW <SolomonW@citi.com> wrote
Don McKenzie wrote

Li-Fi,

Needs line of sight.

Not if you use a mirror.
Click to expand...

If LiFi is only replacing the last link to the PC etc. I can't see any real advantage over WiFi.
Still need cable/fibre etc. or maybe you could use WiFi to talk to the LED ;)
 
On 22-Oct-13 6:39 AM, yaputya wrote:
"Rod Speed" <rod.speed.aaa@gmail.com> wrote in message news:bcl6u6F3dtgU1@mid.individual.net...
SolomonW <SolomonW@citi.com> wrote
Don McKenzie wrote

Li-Fi,

Needs line of sight.

Not if you use a mirror.

If LiFi is only replacing the last link to the PC etc. I can't see any real advantage over WiFi.
Still need cable/fibre etc. or maybe you could use WiFi to talk to the LED ;)
Click to expand...

Hmmmm.

Having posted this news myself after thinking, "what a nifty new idea". With a few years of development and testing, it
could a very viable means of communication.

But then two questions arouse.
How do you do two way comms with a LED?
How do you connect the Internet to the micro in the LED lamp?

I couldn't see anything in the stories I read.

Perhaps all the magic is done with Wi-Fi, and this Li-Fi only replaces the last transmission link (OK secured) as
yaputya.rightlegout suggests.
:)

Don...


--
Don McKenzie

All Olimex products now 30% off normal Olimex Prices.

$25 for an Olinuxino Linux PC:
http://www.dontronics-shop.com/olinuxino.html

The World's Cheapest Computer:
DuinoMite the PIC32 $20 Basic Computer-MicroController
http://www.dontronics-shop.com/the-maximite-computer.html
Add VGA Monitor/TV, and PS2 Keyboard, or use USB Terminal
Arduino Shield, Programmed in Basic, or C.
 
On Mon, 21 Oct 2013 21:39:53 +0200, "yaputya"
<yaputya.leftlegin@gmail.com> wrote:

>I can't see any real advantage over WiFi.

No RF, for one thing.
 
yaputya <yaputya.leftlegin@gmail.com> wrote
Rod Speed <rod.speed.aaa@gmail.com> wrote
SolomonW <SolomonW@citi.com> wrote
Don McKenzie wrote

Li-Fi,

Needs line of sight.

Not if you use a mirror.

If LiFi is only replacing the last link to the PC etc. I can't see any
real advantage over WiFi.
Click to expand...

The most obvious one is the speed and the fact that there would be
no interference with the LiFi in adjacent houses etc. With a massive
downside that you couldn’t have a single router with most houses.

Still need cable/fibre etc. or maybe you could use WiFi to talk to the LED
;)
Click to expand...

You'd need to to cover the whole house.
 
On Tue, 22 Oct 2013 04:34:58 +1100, "Rod Speed"
<rod.speed.aaa@gmail.com> wrote:

SolomonW <SolomonW@citi.com> wrote
Don McKenzie wrote

Li-Fi,

Needs line of sight.

Not if you use a mirror.
Click to expand...

EVERY home and business was about to or is to get optic network so not
really much point? Just get two or more outlets my office had around
twenty in various rooms
--
Petzl
Q: What has Tony Abbott promised Murdoch?
A: A broadband network that will be so slow as to offer no competition to his pay TV interests.

http://tinyurl.com/LOBBYIST-RUN-ABBOTT
http://www.abc.net.au/7.30/content/2013/s3861931.htm

FTTN, while an incremental improvement on what we have now,
is a short-sighted waste of time and money that will still
leave Australia lagging behind the rest of the developed World,
squandering billions of dollars on obsolete technology in the process.
 
Petzl <petzlx@gmail.com> wrote
Rod Speed <rod.speed.aaa@gmail.com> wrote
SolomonW <SolomonW@citi.com> wrote
Don McKenzie wrote

Li-Fi,

Needs line of sight.

Not if you use a mirror.

EVERY home and business was about to or is to get optic network
Click to expand...

No, nothing like that. Even the NBN was only ever sposed to get
to be 93% of those with FTTP.

so not really much point? Just get two or more outlets
my office had around twenty in various rooms
Click to expand...

But few would be that silly in the home.
 
On Tue, 22 Oct 2013 12:46:29 +1100, "Rod Speed"
<rod.speed.aaa@gmail.com> wrote:

Petzl <petzlx@gmail.com> wrote
Rod Speed <rod.speed.aaa@gmail.com> wrote
SolomonW <SolomonW@citi.com> wrote
Don McKenzie wrote

Li-Fi,

Needs line of sight.

Not if you use a mirror.

EVERY home and business was about to or is to get optic network

No, nothing like that. Even the NBN was only ever sposed to get
to be 93% of those with FTTP.

7% missing out big deal
Click to expand...

so not really much point? Just get two or more outlets
my office had around twenty in various rooms

But few would be that silly in the home.
Click to expand...

You don't know!
In the 50's our house had 1 power point in living Room
Kitchen had a stove power point for fridge one for kettle
Each room had a light bulb
Now heaps of power points every where even in roof space and outside

I have a WD media "gazo"
http://wdc.com/en/products/products.aspx?id=330
Internet connectivity is pointless with copper wire
I use a 1TB drive USB 3 play to my video collection from
http://www.lacie.com/au/products/product.htm?id=10564
Trouble is the media is only USB 2 and speed is the thing
--
Petzl
Q: What has Tony Abbott promised Murdoch?
A: A broadband network that will be so slow as to offer no competition to his pay TV interests.

http://tinyurl.com/LOBBYIST-RUN-ABBOTT
http://www.abc.net.au/7.30/content/2013/s3861931.htm

FTTN, while an incremental improvement on what we have now,
is a short-sighted waste of time and money that will still
leave Australia lagging behind the rest of the developed World,
squandering billions of dollars on obsolete technology in the process.
 
Petzl <petzlx@gmail.com> wrote
Rod Speed <rod.speed.aaa@gmail.com> wrote
Petzl <petzlx@gmail.com> wrote
Rod Speed <rod.speed.aaa@gmail.com> wrote
SolomonW <SolomonW@citi.com> wrote
Don McKenzie wrote

Li-Fi,

Needs line of sight.

Not if you use a mirror.

EVERY home and business was about to or is to get optic network

No, nothing like that. Even the NBN was only ever
sposed to get to be 93% of those with FTTP.

7% missing out big deal
Click to expand...

Its very far from clear that it would have ever got to 93%

so not really much point? Just get two or more outlets
my office had around twenty in various rooms

But few would be that silly in the home.

You don't know!
Click to expand...

I do know that most don't even bother with Cat5 or Cat6
in most rooms, most only use wifi around the house.

In the 50's our house had 1 power point in living Room
Kitchen had a stove power point for fridge one for kettle
Each room had a light bulb
Click to expand...

We had a lot better than that in the 50s.

> Now heaps of power points every where even in roof space and outside

I had that in the 60s.

I have a WD media "gazo"
http://wdc.com/en/products/products.aspx?id=330
Internet connectivity is pointless with copper wire
Click to expand...

Bullshit. Works fine for me.

I use a 1TB drive USB 3 play to my video collection from
http://www.lacie.com/au/products/product.htm?id=10564
Trouble is the media is only USB 2 and speed is the thing
Click to expand...

I play recorded TV on my laptop from the PVR over
wifi when bottling the beer etc and it works fine.
 
"Jeßus" <none@all.org> wrote in message news:qj2b6952tdornf5hra7010ba944b4bpgcc@4ax.com...
On Mon, 21 Oct 2013 21:39:53 +0200, "yaputya"
yaputya.leftlegin@gmail.com> wrote:

I can't see any real advantage over WiFi.

No RF, for one thing.
Click to expand...

That's an advantage for security, but you'd have to keep the blinds closed!
 
Don McKenzie wrote:
Forget Wi-Fi, boffins get 150Mbps Li-Fi connection from a lightbulb

Scientists in China are reporting great success in replacing
traditional Wi-Fi radio traffic with Li-Fi, a system that uses the
light signals from an LED lightbulb to provide a line-of-sight data
stream.
Li-Fi, or light fidelity, was developed by Professor Harald Haas at
the University of Edinburgh, who was disenchanted with radio as a
data transmission tool. Using light instead of radio opens up 10,000
times more available spectrum than radio – and it's highly energy
efficient compared to radio towers that use most of their power for
cooling and only five per cent for data transmission.
Read the full story at:
http://www.theregister.co.uk/2013/10/18/forget_wifi_chinese_boffins_get_150mbps_lifi_connection_from_a_lightbulb/

also:
http://www.slashgear.com/302172-19302172/
http://www.bbc.co.uk/news/technology-24579776
http://en.wikipedia.org/wiki/Li-Fi


--
Don McKenzie

All Olimex products now 30% off normal Olimex Prices.

$25 for an Olinuxino Linux PC:
http://www.dontronics-shop.com/olinuxino.html

The World's Cheapest Computer:
DuinoMite the PIC32 $20 Basic Computer-MicroController
http://www.dontronics-shop.com/the-maximite-computer.html
Add VGA Monitor/TV, and PS2 Keyboard, or use USB Terminal
Arduino Shield, Programmed in Basic, or C.
Click to expand...

NASA gets 622 megabits per second with Lasers.

NASA Is Now Communicating With Spacecraft Via Laser
Over the weekend, NASA and MIT made spaceflight history when their Lunar
Laser Communications Demonstrator (LLCD) beamed data at 622 megabits per
second—5 times the current rate—back from a spacecraft in lunar orbit.


http://www.popularmechanics.com/science/space/nasa/lunar-laser-communication-experiment-succeeds-16068586
 
That Popular Mechanics item reminded me of an archive site that is worth a visit:
http://www.popsci.com/archives


NASA gets 622 megabits per second with Lasers.

NASA Is Now Communicating With Spacecraft Via Laser
Over the weekend, NASA and MIT made spaceflight history when their Lunar Laser Communications Demonstrator (LLCD) beamed data at
622 megabits per second-5 times the current rate-back from a spacecraft in lunar orbit.


http://www.popularmechanics.com/science/space/nasa/lunar-laser-communication-experiment-succeeds-16068586
Click to expand...
 
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