Simple Lie Detector

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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.

Schematic

Parts

Part	Total Qty.	Description	Substitutions
R1	1	33K 1/4W Resistor
R2	1	5K Pot
R3	1	1.5K 1/4W Resistor
C1	1	1uF 16V Electrolytic Capacitor
Q1	1	2N3565 NPN Transistor
M1	1	0-1 mA Analog Meter
MISC	1	Case, Wire, Electrodes (See Nots)

Notes

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.

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.

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Comments

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prateek Simple Lie Detector Thursday, November 22, 2012 10:58:06 AM

is this really works if yes plz mail me back coz i wana do this project

sneha Simple Lie Detector Tuesday, November 06, 2012 2:03:46 PM

I want to ask about how does analog meter works in dis lie detector??

ramya Simple Lie Detector Friday, August 24, 2012 7:29:13 AM

ARE THE 4.5V IN THE DIAGRAM BATTERIES ? HOW MUCH WE NEED TO GIVE THE POTENTIAL VOLTAGES

ramya Simple Lie Detector Friday, August 24, 2012 7:26:01 AM

i am a BTECH 3rd year student .i want to submit this project in my college as a minor project so please give me it's complete information project report and pdf file .please send as early as possible we have a limited time.thank u ..................

anonymous Simple Lie Detector Monday, August 06, 2012 4:00:21 AM

AHEM. Professional lie detection examiner specified "ask yes or no questions only" by preparing brackets (sets) of questions ahead of time

Vinanth Simple Lie Detector Sunday, July 15, 2012 4:45:40 AM

I did not find the transistor of that you said. He i try any other transistor what would be the circuit

raviraj Simple Lie Detector Monday, April 23, 2012 2:16:32 AM

yes i made the circuit and its working well.

anonymous Simple Lie Detector Monday, March 12, 2012 10:58:50 AM

its wonderfull.not only this the superb collection of all the stuff.its just amazing!

Kenzie Simple Lie Detector Monday, February 06, 2012 7:19:22 PM

is there a kind of lie decetor where you do not have to hook in wires and painless?

anonymous Simple Lie Detector Wednesday, January 11, 2012 8:34:54 AM

i want to do this project.is it works only in a tenssed condition?when you saying lie to test this is it work?

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prateek	Simple Lie Detector	Thursday, November 22, 2012 10:58:06 AM
is this really works if yes plz mail me back coz i wana do this project
sneha	Simple Lie Detector	Tuesday, November 06, 2012 2:03:46 PM
I want to ask about how does analog meter works in dis lie detector??
ramya	Simple Lie Detector	Friday, August 24, 2012 7:29:13 AM
ARE THE 4.5V IN THE DIAGRAM BATTERIES ? HOW MUCH WE NEED TO GIVE THE POTENTIAL VOLTAGES
ramya	Simple Lie Detector	Friday, August 24, 2012 7:26:01 AM
i am a BTECH 3rd year student .i want to submit this project in my college as a minor project so please give me it's complete information project report and pdf file .please send as early as possible we have a limited time.thank u ..................
anonymous	Simple Lie Detector	Monday, August 06, 2012 4:00:21 AM
AHEM. Professional lie detection examiner specified "ask yes or no questions only" by preparing brackets (sets) of questions ahead of time
Vinanth	Simple Lie Detector	Sunday, July 15, 2012 4:45:40 AM
I did not find the transistor of that you said. He i try any other transistor what would be the circuit
raviraj	Simple Lie Detector	Monday, April 23, 2012 2:16:32 AM
yes i made the circuit and its working well.
anonymous	Simple Lie Detector	Monday, March 12, 2012 10:58:50 AM
its wonderfull.not only this the superb collection of all the stuff.its just amazing!
Kenzie	Simple Lie Detector	Monday, February 06, 2012 7:19:22 PM
is there a kind of lie decetor where you do not have to hook in wires and painless?
anonymous	Simple Lie Detector	Wednesday, January 11, 2012 8:34:54 AM
i want to do this project.is it works only in a tenssed condition?when you saying lie to test this is it work?