Science Buddies: "Ask an Expert"

Hi

i have a graduation project of building a laser communicator , to transfer data ( audio , and visual data images or video ) through laser beam or a fiber optic cable , i need a circuit for that .
i searched alot but i found only for audio , and it also was so simple , i mean it is not good for a graduation project so i can get data and results from it .
i'm afraid and tired , I approached the date of delivery of the project, i searched alot , and the second problem that ; i faced many theoritical problems and i'm working on it , so i missed the practical part .

Sally

Hi,

Here are a set of instructions on one way to do what you want. I cannot vouch for how good they are:

http://www.instructables.com/id/Send-Mu ... aser-Beam/

Here is a commercial kit with descriptions of experiments:

http://science.uniserve.edu.au/school/c ... /blows.pdf

This might help give you ideas:

http://techresearch.intel.com/UserFiles ... tonics.pdf

The general rule in engineering o\is tjat a simple design is best. The simple design in this cases is connect an LED to the output of a radio (via the speaker jack) and point the LED at a photodiode. Connect the output of the photoodiode to earphones, or put an amplifier between the photodiode and a speaker. That should work, and anything more complicated is overkill for this assignment..

Hope this helps.

Don’t stress over it!

Best regards,

Barrett L. tomlinson

Hiiiiiiiiiiii
thanks alot for the nice websites , and i really benifit by them , and i finished my audio circiut , but now i have another question : how can i build a laser circuit ,so i can transmit a video by it , what are the video signal generator and a display monitor suitable for the circuit ?

thanks,

Sally