SEQUENTIAL_LED_FLASHER_WITH_REVERSIBLE_DIRECTION

Published:2009/7/9 2:13:00 Author:May | From:SeekIC

A 555 timer clocks a 74190 up/down counter. The 74190 drives BCD decoder driver 7442. The 7476 is used to reverse the count on 0 and 9, which results in an up-down-up-down count sequence.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/LED_and_Light_Circuit/SEQUENTIAL_LED_FLASHER_WITH_REVERSIBLE_DIRECTION.html

Print this Page | Comments | Reading(3)