science project

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Hot Juan's
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science project

Post by Hot Juan's » Wed Mar 31, 2004 12:18 pm

I am interested in having two points communicate with each other, for a science project. I would like point A to emit a constant or pulsed signal, possibly a FM signal, that has a range of 100 meters. And on the other end, I would like a receiver to ‘hear’ the signal and signal an LED and a buzzer. For someone that knows VERY little about electronics, is this possible? I have been looking online for kits, but have yet to find anything. Also, I do not want to spend an arm and a leg on this project.

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Re: science project

Post by wd5gnr » Wed Mar 31, 2004 3:07 pm

Take a look at and make a trip to Radio Shack. I think this will do what you want.

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Re: science project

Post by Mike » Wed Mar 31, 2004 6:44 pm

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Hot Juan's:
Also, I do not want to spend an arm and a leg on this project.<hr></blockquote><p>well, then i wouldn't take that trip to RadioShack.

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Re: science project

Post by myp71 » Wed Mar 31, 2004 7:07 pm


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Chris Smith
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Re: science project

Post by Chris Smith » Wed Mar 31, 2004 10:03 pm

A simple way to do something like this can be with the use of a laser, and a 567 tone decoder with a photo detector. You can use a common Red laser pen and a small motor with pie wheel complete with hole, and spin the pie wheel in front of the laser to modulate it. <p>The 567 tone decoder and Photo Detector can be set to adjust, and trigger at the pulsed frequency of the laser and spinning pie wheel, similar to a tachometer. <p>The whole project can be done for under 20 bucks as well?

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