Voice-stress analyzer, a form of "lie detector" based on the voice. Est. cost: $48 (kit).
POPTRONIX HOBBYISTS HANDBOOK Winter 1996 pg. 62
Psych-analyzer. Check emotions and sensibilities by measuring galvanic skin resistance. A kind of "lie detector".
POPULAR ELECTRONICS [1] Feb 1969 (v.30#2) pg. 27
Very simple "beginner's" lie detector circuit.
POPULAR ELECTRONICS [1] May 1973 (v.3#5) pg. 76
Build a vocal "truth" analyzer. Hand-held LED-display instrument is said to detect voice stress. Estimated cost: $79.
POPULAR ELECTRONICS [1] Apr 1980 (v.17#4) pg. 66
Correction POPULAR ELECTRONICS [1] Jan 1981 (v.19#1) pg. 12
Build a "lie detector". Consists of a simple tone generator where the frequency of the tone varies with the resistance across two metallic contact rings. The variable resistance is caused by moisture on the fingers.
POPULAR ELECTRONICS [2] Jan 1990 (v.7#1) pg. 70
Build a voice-stress analyzer (a type of polygraph). Est. cost: $48 (kit).
POPULAR ELECTRONICS [2] Mar 1996 (v.13#3) pg. 41
Build a lie detector. Monitor your skin's change in resistance for varying stress levels with this sensitive bio-feedback type instrument.
POPULAR ELECTRONICS [2] Apr 1997 (v.14#4) pg. 31
Lie detector causes a needle to move from "truth" to "lie" according to the amount of moisture generated by the "victim's" sweaty palms.
POPULAR SCIENCE May 1973 (v.202#5) pg. 118
LED bar-graph display. Eight simple electronic gadgets include a lie detector.
RADIO-ELECTRONICS Oct 1979 (v.50#10) pg. 93
Simple lie detector measures a suspect's skin resistance before, during, and after he gives an answer to a question.
RADIO-TV EXPERIMENTER Dec 1968-Jan 1969 (v.25#3) pg. 39