|We propose an automatic LED light that switched on by itself incase of a power cut or failure by any reason. The light needs a 230V AC input and then it’s converted to 12V DC to charge the battery needed in circuit. This charged battery power is now used as soon as power from the mains is cut off or in case we want to use it otherwise.
A PNP transistor is used to operate this system. The importance of the light arises when we use it for a good energy conversion efficiency Li-Ion/ Nicd/ Nimh re chargeable batteries are used for getting a long usage life for the light.