How do solar powered street lights work?

Abstract— The project is designed for Solar powered pedestal street lights that uses solar power from PV cells. For controlling the charging of the battery a charge controller is been used, and an LDR is used to sense the light on day as well as the evening time. The intensity of street lights is required to be kept high during the peak hours.

What is an automatic street light controller?

This paper presents an automatic street light controller with the help of light dependent resistor (LDR) - and relay timer module. LDR is which also known as photo resistor is made cadmium sulfide . The circuit also consists of a charging controller -. The light intensity is inspected using an LDR sensor.

How do street lights work?

The street lights are switched on using a sensing device LDR LED lights at the dusk and then switched off automatically when the timer set in the timer relay module stops. Due to which there is low energy consumption and the system works long life so that they can fast replace conventional lights world over.

How to save energy in solar based system?

For energy saving of solar based system, also a charge controller is used to protect the battery from over charging, overloading and deep dischargeing protection. A light sensing device LDR (Light Dependent Resistance) is used, whose resistance reduces drastically for sensing purposes.