TIMED_NIGHT_LIGHT

Published:2009/7/14 12:27:00 Author:May | From:SeekIC

A small lamp is turned on via switch Q2 for a predetermined time. S1 initiates the 555 timer cycle, holding on Q1 and switch Q3, supplying power to the circuit, and Q2, turning on the lamp. At the end of the cycle, power is removed from the circuit because Q3 is cut off. Therefore, no current is drawn from the battery during standby.



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

Print this Page | Comments | Reading(3)