The 555 timer IC acts as a comparator circuit, with pin 6 connected to the positive supply voltage and pin 2 connected to the LDR. When the ambient light level falls below a certain threshold, the ...

Smart Street Light Control System using 555 Timer IC, LDR, and Relay. - smart-street-light-control-system-555-IC/README.md at main ... The system uses an LDR (light dependent resistor) to detect the ...