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Old 1st February 2005, 03:07 PM   #1
jpenny2k is offline jpenny2k  Philippines
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Lightbulb Help :FM Sound Project

Hello, do you guys have any idea on how to do an FM sound project.

here are the requirements:
Modulation: FM
Baseband: 100-500hz Sine Wave
Transmission: Air
Carrier Frequency: 50Khz (Ultrasonic)

I do not know how to start from scratch. Lol
The instructor just wanted us to demo FM transmitting and receiving by any means using the requirements above.

Thanks guys!
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Old 2nd February 2005, 12:06 AM   #2
DragonMaster is offline DragonMaster  Canada
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howstuffworks.com

ESP's(sound.au.com) FM transmitter project, the description page might help.

http://members.tripod.com/~transmitters/links.htm look at the middle of the page.
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Old 2nd February 2005, 12:06 PM   #3
jpenny2k is offline jpenny2k  Philippines
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thanks!

additional help would still be appreciated
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Old 2nd February 2005, 12:45 PM   #4
paulb is offline paulb  Canada
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Join Date: Jun 2001
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Take a look at
http://www.national.com/an/AN/AN-146.pdf
You would have to adapt it and use ultrasonic transducers instead of coupling it to the AC power line, but the FM parts are all there.
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