DESIGN CONSTRUCTION OF SOLAR STREET LIGHT

ABSTRACT

This system is designed for outdoor application in unelectrified remote rural areas. This system is an ideal application for campus and village street lighting. The system is provided with battery storage backup sufficient to operate the light for 1011hours daily. This project is about to develop and fabricate the circuit that can charge the lead acid battery during day time by using solar as a source.

To control the circuit for charging, we have used the circuit charging that can implement the condition. When charging condition, red LED will turn on until the battery reach the full charge state that is in floating condition and green LED will turn on. For the regulation of voltage that enters circuit, we use IC LM 338. For the overcharging, the relay connected to T1 specifically controls the limit of the battery. The IC555 incorporated with the light Depending resistor LDR will determine whether it is daytime or night time. The light will automatically on when the light depending resistor resistance reduces and the lamp comes on. When night change to the day, LDR sensor detect the ray from the sun, IC 555 will give the output to off the lamp and the charging circuit will continue to charge the battery for day .

With this project, our goal is to design and implement an electrical system that collects and stores solar energy, and delivers power to light emitting diode LED smart light. The resulting system would reduce street light energy costs by 100 since they would not draw any power from the grid, and would be self contained and selfsustaining.