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Probably not a good idea to try this out depending on where you live, etc.. etc.. here's the "world's simplest radio jammer". The project uses a 100 MHz crystal which I haven't seen, the page goes on to say that it was procured out of some old circuit board from the 90s. Link.
The World's Simplest Radio Jammer
Probably not a good idea to try this out depending on where you live, etc.. etc.. here's the "world's simplest radio jammer". The project uses a 100 MHz crystal which I haven't seen, the page goes on to say that it was procured out of some old circuit board from the 90s. Link.
Posted by Phillip Torrone |
Apr 25, 2005 10:16 AM
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This is a classic Afrotech story. One of the best "mods" sites around.
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It is very short on details...can anyone point me to more detailed information?
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The reason it interferes with a large band of frequencies is because it is trying its best to produce a 100 MHz SQUAR wave which is the sum of every odd-frequency harmonic of 100 MHz sinewave.
So, when you broadcast it, anyone looking for a sinewave on practically any grequency sees a signal, and this signal interferes with the official signal.
But it would be bad to build one of these.
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You also need to check out this guy
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You also need to check out this guy's speaker system, which is based on old hard drive mechanisms (the heads dance to the music!), and his dangerous-looking professional soldering center controller. Afrotech is a 1337 haX0r.
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Here's 10 of 'em!
Ebay!
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Now with links!
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These are not 'crystals' but integrated crystal oscillators, that indeed produce a square wave output. Keep in mind you'll also be blocking local cordless phones (911 blocking, not a great idea imho).
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Do not (Damn apostraphe problem again. ARGH!!!) kill yourself trying to outbid Mr P. T. since you can get 106.25 MHz jobbies from DigiKey any day of the week.
http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=253568&Row=470880&Site=US
Jameco.com also has 100 MHz TTL oscillators for $2.49
http://jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=118963&searchValue=osc100
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I ordered in a 100mhz crystal oscillator and hooked it up. Guess what, that's right it oscillates at 100mhz. It did not interfere with any other frequency. Project failed.
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What would be great is an FM jammer with the ability to increase or decrease the jamming. I sit in a cubicle, and the person next to me, despite frequent requests to stop, plays their radio. Ever try to code c# listening to the Jerry Springer show? (It's a 'tv' radio).
If I could turn up the jamming power enough to just jam the radio in the cubicle next to me, that would be excellent.
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this would have been really handy in the dorm where i used to live. I used to have someone living next to me who would always turn up the radio! it was so annoying!
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