LDR Based light Intensity Control for Street Lights

In the system, generally the lighting up of highways is done through High-intensity discharge lamps. Because, the energy consumption of these lamps is high. This project uses an LEDs to overcome the drawbacks of High-intensity discharge lamps. This project demonstrates the usage of light emitting diodes as a light source. These lights consumes low power and its life is more as compared to High-intensity discharge lamps.A light depending resistor is used to detect the light. The resistance of the LDR drastically reduces according to the daylight. A bunch of LEDs are used to make a street light. The microcontroller comprises programmable instructions that controls the light intensity based on the Pulse width modulation signals generated. The light intensity is kept high during the peak hours, and as the traffic on the highways tend to decrease in late nights: and the light intensity also decreases till morning. Finally, the street lights completely shut down at morning and continues again at evening 6pm and this project  developed by connecting it with a solar panel, which converts the intensity of the solar into corresponding voltage, and this energy is used to feed the street lights on highways.