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how to: DIY Knock Detector

Discussion in 'General Tech Articles' started by TurboMirage, Aug 15, 2008.

  1. TurboMirage

    TurboMirage YEEAAAHHH VIP

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    i take no credit for this... but i built mine own according to this article.

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    bought my materials at rad shack for $20
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    open it up.
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    the microphone was cut off of the circuit board. take care to not forget the polarity. i wired up 6ft of wire and soldered it to the mic, then stuffed it into the alligator clip and secured it.
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    repeat on the other side. i used green for negative and red for positive.
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    put it back together and test it out. works best with a friend. put the headphones on and clip the "mic" to something that makes noise (like the fridge... or your cat!) turn it on and listen!
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    and that is how we do it.
     
  2. efhondakid

    efhondakid My name is Byron. VIP

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    Hmm, I think Ill have to build myself one of these things.
     

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