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jammer.jpg
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.

Phillip Torrone

Editor at large – Make magazine. Creative director – Adafruit Industries, contributing editor – Popular Science. Previously: Founded – Hack-a-Day, how-to editor – Engadget, Director of product development – Fallon Worldwide, Technology Director – Braincraft.


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Comments

  1. BrK says:

    This is a classic Afrotech story. One of the best “mods” sites around.

  2. shortname says:

    It is very short on details…can anyone point me to more detailed information?

  3. alankilian says:

    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.

  4. airship says:

    You also need to check out this guy

  5. airship says:

    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.

  6. Novysan says:

    Here’s 10 of ‘em!

    Ebay!

  7. wsuverkropp says:

    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).

  8. alankilian says:
    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
  9. HarryDangler says:

    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.

  10. ewbaker says:

    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.

  11. miscblogger says:

    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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  12. Joey Bowen says:

    It is a 100 Mhz Crystal Oscillator… in any case thanks for the interesting post on how to build a radio jammer.

  13. Frederick Bauer says:

    if the alpha wave, the brain, is between 7 and 12 Hz then why would you want to start at 100?, we need something from o to infinity with a limited perimeter, something like ten to fifteen feet, just a personal jammer for sine(heart) and the other for alpha (heart), I am tired of having slight arithmia from assholes with a sine generator, that will kill a person, and alpha, mind telephathy, I am tired of thinking to assholes I do not know, can you believe they even fuck with my dreams?, I do not want to kill them I just want to jam them so they will stop using my electronic equipment.
    Bauer

    1. Frederick Bauer says:

      you should work for the Federal Government Bauer and save us from all of this death

      1. Frederick Bauer says:

        I am the third Frederick Bauer to agree, now you the Federal Government tell me who I am or you are or we are or where I am transmitting from if you think there is a problem

  14. Sudheer says:

    Fine. It is looking very short. We feel very happy if you provide some more detailed information about this radio jammer. Here I have another circuit diagram on the same concept. If anybody interested, visit http://goo.gl/WLA4MM