EXIT_DELAY_FOR_BURGLAR_ALARMS

Published:2009/6/14 22:16:00 Author:May | From:SeekIC

Depressing S1 charges C1 to the supply voltage. This biases Q1 on via bias resistors R2 and R3. A voltage is available for the duration of the delay period, to hold off the alarm circuit.C1 can be increased or decreased in value to al-ter the delay times.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Alarm_Control/EXIT_DELAY_FOR_BURGLAR_ALARMS.html

Print this Page | Comments | Reading(3)