How to build a lie detector for under $20

November 29, 2007 by Geeks are Sexy | 4 comments

Here’s a short video tutorial that will teach you how to make a cheap lie detector for under $20. Can anyone here confirm if “commercial” lie detectors also work that way?

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4 Responses to “How to build a lie detector for under $20”

  1. ninja.s says:

    I can’t verify if commercial lie detectors are similar, but wow, that’s an awesome vid. I’m saving that for later… experimentation.

  2. Jon says:

    good one!(no lie) i think i will build one.(no lie) i’ll get back to you on that (sound quality changes)…..
    jon

  3. cirtex says:

    nice vdo , human creativity is unlimited

  4. Ayu says:

    Nice one!

    so how to know if that person is lying?
    the sound pitch will get lower or higher?

    i’m a little confused.

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