LIE DETECTER

[JITHIN.M.G]

 I WANT KNOW  MORE ABOUT CONSTRUTION AND WORKING OF SIMPLE LIE DETECTER

[AJISH ALFRED]

 

Hi,

 

The simplest lie detector works on the basis of measuring skin resistance. We are said to be sweat more than normal when we tell lie and hence at that time skin resistance decreases significantly.

 

Here is an example of a simple lie detector

http://www.aaroncake.net/circuits/lie.asp

[Amrith]

A polygraph (popularly referred to as a lie detector) measures and records several physiological indices such as blood pressure, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions.The belief is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers.

Google for circuits to build a basic lie detector.

[Author]

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