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Simple Lie Detector

Discussion in 'Electronic Projects' started by ElectroMaster, Jul 19, 2002.

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  1. guru_nikhil

    guru_nikhil New Member

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    Thats Fantastic
     
  2. Roff

    Roff Well-Known Member

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    Beauty is in the eye of the beholder...:p
     
  3. paulbs

    paulbs New Member

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    nice post thanks
     
  4. dave

    Dave New Member

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  5. baswaraj

    baswaraj New Member

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    thanksssssssss
     
  6. rlp007

    rlp007 New Member

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    Thanks Buddy :)
     
  7. vterminater

    vterminater New Member

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    hey can i use a multimeter instead of the analog meter shown...? i have already built it but it doesnot work..
     
  8. audioguru

    audioguru Well-Known Member Most Helpful Member

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    The circuit is just a simple ohm-meter. Use a multimeter set to volts or mA as its display.
    A multimeter has a better ohm-meter. Then you don't need this simple circuit.
     
  9. MALLI

    MALLI New Member

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    should i arrange disply to this simple detector
     
  10. lei-mex

    lei-mex New Member

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    curious ako...pwede ba gumamit ng sensor sa simple lie detector?...tnx
     
  11. MALLI

    MALLI New Member

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    i think if u arrange colour display through cell display
     
  12. medsol

    medsol New Member

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    please tell me what's if aperson is more static charged person.
     
  13. audioguru

    audioguru Well-Known Member Most Helpful Member

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    A person is not static charged. But if the air is dry, the person is insulated from ground and combs his very dry hair or removes a very dry sweater then he can become static charged until he touches something that is grounded.

    I had some shoes with synthetic (plastic) soles. At work the carpet was synthetic (plastic). My shoes and the carpet were very good insulators and in winter the air was very dry. When I shuffled my shoes on the carpet as I walked I developed a very high static voltage and I zapped anybody who came near me. A long spark jumped from my finger and the telephone system would reset. I got leather soled shoes and the static stopped.
     
  14. wagamama

    wagamama New Member

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    Simple lie dectector

    I got a project on this and we are to write a 2 to 3 pages of report explaining How does this relate in the theory of physics.
     
  15. audioguru

    audioguru Well-Known Member Most Helpful Member

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    We talk about electronic circuits here, not physics.

    The lie detector circuit is a simple ohm-meter. Some people (not everybody) sweat when they say a lie. The sweat reduces their skin's resistance and the ohm-meter shows it.
    Then add 2 more pages of blah, blah, blah etc.

    Look at Lie Detector in Google. There are many other things to sense plus a lot of experience reading them to guess that a person is saying a lie.
     
  16. maxpuck

    maxpuck New Member

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    Parts in the Lie Detector

    How does each piece contribute to the Lie Detector? Please write in detail.
     
  17. audioguru

    audioguru Well-Known Member Most Helpful Member

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    The circuit is an extremely simple ohm-meter.
     
  18. killivolt

    killivolt Well-Known Member

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    So, If I'm a really sweaty gross kind of person. I'm a really bad lair.

    I think someone really has it out for stinky sweaty people.:p


    kv:D
     
  19. Roff

    Roff Well-Known Member

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    If you're a short circuit before the questioning starts, that's the baseline. You can lie like a rug and no one can tell.:D
     
  20. birdman0_o

    birdman0_o Active Member

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    This is based on the fact that when people lie they presumably sweat a bit because they are stressed. So many co-factors could explain the jumping of the multimeter, e.g. the lights in the room are too hot making the hand sweet or that theyr scared your going to shock them with your scary looking lie detector

    Build this if your bored

    Mike
     
  21. killivolt

    killivolt Well-Known Member

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    No, you build it for stinky sweaty people.

    The when they lie during the interview you shock them for wasting your time.:p



    kv:D
     
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