Lie Detector KIT - LD-1 This kit can be great fun at parties. Lie and an audible tone will change, the more you lie the louder the tone. When you lie your hands sweat, this kit allows you to measure these changes. We measure Galvanic Skin Resistance. Only a very slight amount of change will cause the tone to increase in frequency.
Power requirement 9 Volt battery or 6 to 12v DC.
PCB size: .8" x 1.2"

Here is the instruction sheet for the LD-2 kit.
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LD-2 Kit $9.95 Quantity:

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Rainbowkits - 121 E. North St. - New Ross IN 47968 - (765) 230-2301