AUTOMATIC STREET LIGHT

                                                          AUTOMATIC  STREET  LIGHT 

Automatic dark detector senses darkness. As the light level decreases and LDR meets the maximum threshold resistance, the circuit automatically switches on the LED D1. 

Dark sensor with variable resistor:

A dark detector can be made using a variable resistor. The sensitivity of the circuit can be adjusted with a variable resistor.

High resistance-> more darkness to switch on the LED.

Low resistance-> less darkness to switch on the LED.