AUTOMATIC_TURNOFF

Published:2009/7/13 4:27:00 Author:May | From:SeekIC

Circuit removes bias from power Darlington about 15 s after both CONTINUE and BUSY signals go low, to conserve battery life in portable electronic equipment. Intecleaved copper patterns on printedcircuit board form touch switch that must be reactivated every 15 s or kept closed by finger contact while equipment is being used.-R.D.Wood, Replace Bulky Mechanical Switches with Touch Controls, EDN Magazine, April 20, 1978, p 132-133.



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