2_INCH_LCD_NUMERALS

Published:2009/7/1 3:52:00 Author:May | From:SeekIC

Uses C1200 clock IC made by LSI Computer Systems, having time set, logic, division for seconds, minutes, and hours, 7-segment decoding, and display drivers and switches. Four-digit liquid crystal display panel (LCD) is MGC-50. S1 and S2 advance minutes or hours on display at 2-Hz rate for setting time. To use as elapsed-time indicator, dose S1 and S2 simultaneously to generate reset pulse that sets timing change to zero. When both switches are released simultaneously, time count starts from zero.-R. F. Graf and G. J.Whalen,AGiant LCD Clock, C0, Feb. 1978, p 18-23 and 76.



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