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A GENERATOR FOR PRODUCING IRREGULAR TIME PERIODS
Author(s) -
Krausman David
Publication year - 1967
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1967.tb02729.x
Subject(s) - incandescent light bulb , flash (photography) , generator (circuit theory) , psychology , diode , capacitor , electrical engineering , power (physics) , optics , physics , engineering , voltage , quantum mechanics
A simple circuit is described which produces “random” timed periods for the presentation of stimuli, etc., in psychophysiologic research. The circuit takes advantage of the basic irregularity in flash rate of inexpensive incandescent flasher lamps sold for use in Christmas lighting displays. Increased irregularity in timing is provided by charging a capacitor when flashes occur in two bulbs simultaneously. A 4‐layer diode and associated circuitry produce a contact closure output.