Emergency Light & Alarm


Posted on Nov 24, 2012

This circuit is permanently plugged into a mains socket and NI-CD batteries are trickle-charged. When a power outage occurs, the lamp automatically illuminates. Instead of illuminating a lamp, an alarm sounder can be chosen. When power supply is restored, the lamp or the alarm is switched-off. A switch provides a `latch-up` function, in order to extend lamp or alarm operation even when power is restored.


Emergency Light & Alarm
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

khaleel   Aug 9, 2007

give complete information on emergency light and alarm how it works? how can we do this project? give viva questions on it?

New Circuits

.

 


Popular Circuits

Telephone Remote switch
76MHz to 119MHz Fm transmitter
20 Khz ring counter
20Mhz-clock-phase-lock
schematics Buck switching regulator based on ATtiny84a -- please critique!
differential analog switch circuit
Isolated Fuse Fail Indicator
HF Transreceiver using NE612
Direct coupling audio power amplifier configuration A741 circuit
Car active subwoofer



Top