POT_TESTER

Published:2009/7/20 20:55:00 Author:Jessie | From:SeekIC

Developed for testing noisy 10K wirewound linear pots used in control of theatrical lighting system. Circuit detects any mo-mentary open and drives LED to produce visible flash lasting about 0.1 s. Circuit operates from -10 V provided by bridge and AC transformer.Left half of IC1 acts as comparator whose out-put stays low as long as input is above thresh-old voltage. When pot passes open point, pin 5 goes high and charges C3, making right half of IC1 turn on LED.-C. J. Shakespeare, Test Your Pot, Modem Electronics, Oct. 1978, p 38-39.



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