DIGITAL_WRISTWATCH

Published:2009/7/1 2:48:00 Author:May | From:SeekIC

Single Intersil ICM7200 IC drives multiplexed display giving choice of hours and minutes, seconds, and day/date. CMOS chip divides 32.768-kHz crystal out-put in long internal binary divider to produce basic 1-s clock rate. Furtherdivision gives other elements of display. Pressing read button once gives hours and minutes;pressing second time gives day and date; and pressing third time gives seconds.-D. Lancaster, CMOS Cook-book, Howard W. Sams, Indianapolis, IN, 1977, p 377-378.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Measuring_and_Test_Circuit/DIGITAL_WRISTWATCH.html

Print this Page | Comments | Reading(3)