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Jun 13, 2010. 6:09 AMnutsandbolts_64
says:
I just got a weird idea... get those IR networking things and replace the IR diodes with lasers!!! DISCLAIMER: I AM NOT RESPONSIBLE IF YOU LOSE ANYTHING AND I MEAN ANYTHING INVOLVING THIS POST!!! and I'm not an electrician...
Jun 27, 2007. 2:45 PMDecamerom
says:
Good afternoon! I am of Brazil. We use too much similar system for contact with the computers between the laboratory of the farm and the city, approximately 50Km. We develop particular a óptico system, such revealed extremely functional. Thanks. Carlos Marmo
Nov 28, 2006. 3:45 PMsysadmn
says:
Simple :-)They're commercially available (http://www.totalcommsystems.co.uk/shop/customer/home.php?cat=137), so it's possible. If you're not looking for ultra-high speeds or long distances, it should be pretty simple. At low speeds, you could probably turn off and on the beam rather than modulate it's intensity. That would make the electronics at each end easier. Off the top of my head,
Computer->serial port-->microcontroller-->laser diode/laser pointer--->photodiode-->microcontroller--serial port.
Computer->serial port-->microcontroller-->laser diode/laser pointer--->photodiode-->microcontroller--serial port.
Feb 2, 2007. 11:49 AMsysadmn
says:
You use sharks! Sharks with Friggin' lasers on their heads :-)
38400 baud should be straightforward with RS-232. The commercial stuff goes to 100Mb/s (or even 145 Mb/s if you run ATM ... Does anyone still run ATM?).
This ( http://members.misty.com/don/laserdio.htm#dioclpm ) claims laser pointers can be modulated at hundreds of MHz, and phototransistors (receivers) go to that range. Might be the difficulty is getting data into the microcontroller fast enough.
38400 baud should be straightforward with RS-232. The commercial stuff goes to 100Mb/s (or even 145 Mb/s if you run ATM ... Does anyone still run ATM?).
This ( http://members.misty.com/don/laserdio.htm#dioclpm ) claims laser pointers can be modulated at hundreds of MHz, and phototransistors (receivers) go to that range. Might be the difficulty is getting data into the microcontroller fast enough.
Feb 3, 2007. 7:43 AMsush_d (author)
says:
hello every1 ....& thanks for taking interest & giving valuable suggestions.
You should check out Ronja (Reasonable Optical Near Joint Access).
They use LEDs and lenses to transmit long distances. Ronja communicates with ethernet cards via the obsolete AUI port.
http://ronja.twibright.com/
They use LEDs and lenses to transmit long distances. Ronja communicates with ethernet cards via the obsolete AUI port.
http://ronja.twibright.com/
Dec 12, 2006. 3:02 PMsysadmn
says:
Clever! You could also map the hardware to a serial port and run PPP over the link.
Nov 28, 2006. 12:44 PMtomc3uk
says:
Ahhh... EoL. ethernet over laser. Perhaps with a light dependent resistor?
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