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Is your friend or spouse lying to you? Build this Lie Detector and find out the truth! Great for parties too!This is the FIRST Lie Detector project on...
I picked up all of the components at Radio Shack except for a few I list at the end. 1. Project Enclosure 2. 4.7K Resistor 3. 82K Resistor 4. 0.01uF ...
You will need a soldering iron/station, solder, screwdriver, hot glue, small drill bit and wire strippers.
Following the schematic shown here, build the circuit. Take your time and make good solder joints.
Install everything in the project enclosure leaving just the Finger Pad leads exposed through drilled holes. I also drilled holes in the box so you ca...
This works on the galvanic skin response. When you lie, your skin becomes moist. While this does work, it's not as accurate as a true Polygraph machin...
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The wattage of the resistors just means the maxium power the resistor can handle before it overheats and (literally) blows up. So yes, they should be able to be replaced with 1W resistors without any problems, even though it is a quite big overkill. The batteries are at the top of the schematic and they are hooked up to the PNP transistor's emitter and the emitter of the NPN transistor and the speaker.
Posted:Nov 28, 2007
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