DUAL_LED_CMOS_FLASHER

Published:2009/6/30 2:49:00 Author:May | From:SeekIC

Circuit NotesInverters ICl-a and ICl-b form a multivi-brator and IC1-c is a buffer. Inverter IC1-d is connected so that its output is opposite that of ICl-c; when pin 6 is high, then pin 8 is low and vice versa. Because pins 6 and 8 are constantly changing state, first one LED and then the other is on since they are connected in reverse.The light seems to jump back and forth be-tween the LED's. The 470-ohm resistor limits LED current. Depending upon the supply vol-tage used, the value of the resistor may have to be changed to obtain maximum light output. To change the switching rate, change the value of the capacitor.



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

Print this Page | Comments | Reading(3)