Automatic Emergency LED Light Circuit Diagram

Automatic Emergency LED Light Circuit Diagram
The batteries are charged continuously with a current of about 7.5 mA via diode D5 and resistor R2. The base of transistor T1 is high via R3, so that the transistor is cut off. When the mains voltage fails say by SW2, C1 is discharged via R1; when the potential across it has dropped to a given value, the battery voltage switches on Q1 via R3 and R1, provided switch S1 is closed. When Q1 is on, current of 20mA flows through diodes D7 and D8 LEDs. The light from these LEDs is sufficient to enable the defect fuse or the tripped circuit breaker to be located.

Video Explanation on Automatic Emergency LED Light Circuit Diagram:



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