However as soon as the ambient light around the LDR diminishes or is switched OFF, the left transistor is inhibited from the base drive due to the LDRs high resistance in the absence of ambient light, which further prompts the right hand side transistor to start conducting, thereby switching ...
The IC1 stage is wired as light activated switch using an LDR as the sensor. The relay associated with IC1 is held deactivated during day time and vice versa. IC2 is configured as a set/reset latch flip flop or bistable stage wherein the relay associated with this IC stays activated whe...