THUMBWHEEL_SET_TO_99_min

Published:2009/7/12 23:52:00 Author:May | From:SeekIC

Developed for timing events and for limiting event to predetermined interval that can be set up with 2-digit BCD-encoded thumbwheel switches. Digital display shows time remaining, as guide for speakers. Audible alarm indicates end of time interval. Flashing decimal point indicates counter is working. Designed for operation from two C cells. To conserve power, display is normally blanked; pressing display-enable switch turns on display for about 4 s Article describes operation of circuitin detail，-R.A.Fairman, CMOS Lowers Timer Power Consurnption,EDN Magazine,Oct.5,1975,p78 and 80.



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