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Emergency led light circuit diagram explain in Hindi

Emergency led light circuit diagram explain in Hindi knowledge Gate It works like the general emergency light; it fixtures are used to automatically provide lighting in the event of a power outage. This emergency LED Bulb Circuit do not uses the relay to ON-OFF the lamp. But use the transistor, it acts as the switch ON-OFF instead. Working began from AC power is fed into the circuit. The Capacitor C1 will reduce the AC voltage 220V to lower volts. The AC low voltage will be rectified by Bridge Rectifier. Then DC voltage will flow to Diode D1 and D2 to the battery. The charger current of circuit will set at 100 mA When plugged into the circuit, the LEDs are not lit. Because the base lead of transistor Q1 get Reverse Bias has higher voltage than the emitter leads. The transistor will “OFF” own conduct. But when the power outage at the base leg voltage is reduced resistor R3 full down pull current makes transistor “ON” have current flow from the battery. Makes LED glow up. The current from battery will do not feedback to the Charging Section Because there is diode D1 block the current by connected the reverse bias between the battery and Charging Circuit.