Sending data over a Laser. - Electronic Circuits Projects Diagrams Free

Simple1 · 26th October 2009, 02:26 AM

First of all, this is not a project for class. I currently have access to a hybrids design clean-room and want to use this opportunity to work on some personal projects.

So I'm trying to build a circuit where i can send data from my laptop through a laser to another laptop. Transmitter ---> Laser ---> Receiver.

I'm having trouble coming up with a good transceiver circuit that would take the data from the computers serial port and convert it so it can be sent over a laser beam. Should I consider programming a micro controller or is there another way.

If anyone has any ideas/suggestions please go ahead and throw it out there. I will keep posting as this project progresses.

Sceadwian · 26th October 2009, 02:31 AM

Why would you need a clean room for that? Send the serial over the laser line directly modulated, on/off

birdman0_o · 26th October 2009, 03:02 AM

What would the receiver be, a solar cell? I've seen that done to transmit an audio signal

I do not know if the response would be quick enough :S

Mike2545 · 26th October 2009, 03:06 AM

There is an article in the current Nuts & Volts about it...

kchriste · 26th October 2009, 03:33 AM

You could adapt one of these. Or, if you want to build it from scratch, I would look into how IR remote controls work and use a Rx module from one of those and an IR laser modulated to work with the Rx module. It depends on how much throughput you want. What is wrong with an AdHoc network using the wireless cards on the laptops?

Sceadwian · 26th October 2009, 05:08 AM

CDS photo cells work relatively well, or photodiodes.

birdman0_o · 26th October 2009, 05:33 AM

Quote:

Originally Posted by Sceadwian

CDS photo cells work relatively well, or photodiodes.

Don't they have a slow response?

birdman0_o · 26th October 2009, 05:34 AM

Hey Mike, which month is the article that you posted from?

Sceadwian · 26th October 2009, 05:46 AM

Depends on what kind of bandwidth you need birdman, a CDS photocell should handle phone quality or better audio, or low speed serial data. A photodiode should be significantly better though all in all.

Simple1 · 26th October 2009, 06:08 AM

I've worked with photocells before when dealing with audio. Basically: speak into a mic, the audio is transferred over a laser to a photocell and picked up by a speaker. But what i want to do now is send a file (word document, folder, maybe a who movie/video file) from my computer, through a laser to another circuit that is hooked up to a different computer.

Quote:

Originally Posted by Mike2545

There is an article in the current Nuts & Volts about it...

What was the month or issue# please?

Thx for all the feedback so far.

Sceadwian · 26th October 2009, 06:14 AM

Simply connect the TX pin of an RS232 port to your laser modulator, and connect the receiving demodulator to the RX pin of the remote machine. Send 2400 baud serial data to confirm it's working and raise the baud rate till it stops working.

Mike2545 · 26th October 2009, 03:57 PM

Quote:

Originally Posted by birdman0_o

Hey Mike, which month is the article that you posted from?

November...

be80be · 26th October 2009, 04:06 PM

Nuts and Volts
Have a lookie LOL

birdman0_o · 26th October 2009, 08:22 PM

Oh heyyy its this months! Means I should be getting it soon

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26th October 2009, 02:26 AM	#1
Simple1	Sending data over a Laser. First of all, this is *not* a project for class. I currently have access to a hybrids design clean-room and want to use this opportunity to work on some personal projects. So I'm trying to build a circuit where i can send data from my laptop through a laser to another laptop. Transmitter ---> Laser ---> Receiver. I'm having trouble coming up with a good transceiver circuit that would take the data from the computers serial port and convert it so it can be sent over a laser beam. Should I consider programming a micro controller or is there another way. If anyone has any ideas/suggestions please go ahead and throw it out there. I will keep posting as this project progresses.

26th October 2009, 02:31 AM	#2
Sceadwian	Why would you need a clean room for that? Send the serial over the laser line directly modulated, on/off __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

26th October 2009, 03:02 AM	#3
birdman0_o	What would the receiver be, a solar cell? I've seen that done to transmit an audio signal I do not know if the response would be quick enough :S __________________ Mike My website: www.ElectroBird.net

26th October 2009, 03:06 AM	#4
Mike2545	There is an article in the current Nuts & Volts about it... __________________ Mike2545 Last edited by Mike2545; 26th October 2009 at 03:23 AM.

26th October 2009, 03:33 AM	#5
kchriste	You could adapt one of these. Or, if you want to build it from scratch, I would look into how IR remote controls work and use a Rx module from one of those and an IR laser modulated to work with the Rx module. It depends on how much throughput you want. What is wrong with an AdHoc network using the wireless cards on the laptops? __________________ Inside every little problem, is a big problem trying to get out. Last edited by kchriste; 26th October 2009 at 03:35 AM.

26th October 2009, 05:08 AM	#6
Sceadwian	CDS photo cells work relatively well, or photodiodes. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

26th October 2009, 05:34 AM	#8
birdman0_o	Hey Mike, which month is the article that you posted from? __________________ Mike My website: www.ElectroBird.net

26th October 2009, 05:46 AM	#9
Sceadwian	Depends on what kind of bandwidth you need birdman, a CDS photocell should handle phone quality or better audio, or low speed serial data. A photodiode should be significantly better though all in all. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har." Last edited by Sceadwian; 26th October 2009 at 05:47 AM.

26th October 2009, 06:14 AM	#11
Sceadwian	Simply connect the TX pin of an RS232 port to your laser modulator, and connect the receiving demodulator to the RX pin of the remote machine. Send 2400 baud serial data to confirm it's working and raise the baud rate till it stops working. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

26th October 2009, 04:06 PM	#13
be80be	Nuts and Volts Have a lookie LOL __________________ Burt http://mybe80be.com http://stores.shop.ebay.com/mybe80be__W0QQ_armrsZ1 Last edited by be80be; 26th October 2009 at 04:07 PM.

26th October 2009, 08:22 PM	#14
birdman0_o	Oh heyyy its this months! Means I should be getting it soon __________________ Mike My website: www.ElectroBird.net