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| Electronic Projects A collection of small electronic circuits and projects you can build. |
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19th July 2002, 08:10 PM
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Simple Lie Detector
Here's a simple lie detector that can be built in a few minutes, but can be incredibly useful when you want to know if someone is really telling you the truth. It is not as sophisticated as the ones the professionals use, but it works. It works by measuring skin resistance, which goes down when you lie.
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9th December 2004, 12:33 PM
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Details of Parts
Here are the details of the specific parts you will need
Part Total Qty. Description Substitutions
Notes 1. The electrodes can be alligator clips (although they can be painful), electrode pads (like the type they use in the hospital), or just wires and tape. 2. To use the circuit, attach the electrodes to the back of the subjects hand, about 1 inch apart. Then, adjust the meter for a reading of 0. Ask the questions. You know the subject is lying when the meter changes. http://www.aaroncake.net/circuits/lie.htm
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Physics-Electronics- |
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21st December 2004, 03:31 AM
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nice post thanks
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4th January 2005, 09:14 PM
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LOL cool
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12th March 2005, 04:07 AM
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Nice. Thanks for the great ideal
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12th March 2005, 04:13 AM
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Hi, I live in a small city and I cant seem to find the correct transistor, do you think there could be any subsitutions? Thanks
Do you think any of these would work? 2N1711 2N3417 2N3439 2N3440 2N3440 2N3771 2N4124 2N4126 2N4400 2N4401 Thanks again |
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1st June 2005, 11:48 PM
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the meter, does anyone know where to get one of the cheap. I went to local electronics store and the cheapest I saw was 5 bucks. What meter did you use OP. or could you cut me a link to some cheap ones.
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15th June 2005, 04:31 AM
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I would use the meter out of one of those cheap battery testers that are about $4 US i think...
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-Ian |
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18th June 2005, 06:23 AM
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hi it was gr8
but ..is there any chance that our skin resistance does not go down when we lie..if so the lie detector would say a lie... thanks bye |
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18th June 2005, 07:17 AM
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reply
Yep
your skin resistance can go down because you are nervous or scared. So it is hard to tell
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Robotics is heaven in my book. |
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21st June 2005, 07:06 PM
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Re: Simple Lie Detector
Quote:
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21st June 2005, 07:56 PM
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reply
What are you talking about?
All the information is on this page and on the schematic except the transistor. But it is documented on this page.
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Robotics is heaven in my book. |
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26th July 2005, 03:58 AM
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great one
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28th July 2005, 03:58 PM
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That's really cool!
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28th July 2005, 04:03 PM
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Sry, can anyone tell what is Electrodes?
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