1.0 INTRODUCTION

In modern society, it is impossible to imagine life without electricity. Modern lives require a continuous supply of electricity. Not only industry, but also in the household. Take the case of an ordinary refrigerator. If you experience a power off situation, your food will be spoilt. But much more important, what if the power failure "spoils" your business. For example, uninterrupted power supply is needed for your server, which manages your accounting programme or provides uninterrupted operation of your website. 

Emergency lights are very useful electrical gadgets and are quite popular, too. During a power failure these portable lights are able to instantly illuminate through battery backup and never allow us to stumble in the darkness. Although you will find a variety of them in different shapes and sizes in the market, but building your own emergency light at home can be a totally different experience. It will not only help you to create a quality design but also will acquaint you to the technical aspects of the unit. Besides, you also get an opportunity to customize the circuit as per your own needs.

The idea of the present emergency light circuit is truly compact, highly advanced, and may be kept plugged into the mains socket for a permanent automatic operation. The use of a Li-Ion battery makes it infinitely long lasting.

OBJECTIVE OF THE PROJECT

The objective of the work is to construct a device that When a power outage occurs, the lamp automatically illuminates. Instead of illuminating a lamp, when power supply is restored, the lamp is switched-off.

1.2 SIGNIFICANCE OF THE PROJECT

This device Provides light when the ordinary lighting fails due to a power cut. Required especially in villages where there are long power cuts. Important to install it near stairs or the place where level changes. Near safety signs it should be installed.

Basically a battery packed light device. This automatically switched on when the light is switched off or there is a blackout. Common in commercial and standard residential buildings. This device is:

1. Battery Efficient

2. Pollution free.

3. Easy to use. 

4. Very cheap 

5. Easy to install anywhere.

1.4 SCOPE OF THE PROJECT

Automatic Emergency light is often considered same as a light device running on an inverter. It is considered a device which has its one end connected to a power source and when the power supply is cut, the bulb glows with the power of inverter. emergency lighting work on the principle that when a power failure occurs in a household at night, a power failure light responds to provide emergency illumination so that the occupants may move about safely in order to take measures to restore the illumination either by changing fuses, if necessary, or by finding and deploying other light sources such as candles, portable electric lanterns, or the like.