Street Lighting System Using Solar Powered Led Light

Megat Samsudin, Megat Muhamad Shafiq (2016) Street Lighting System Using Solar Powered Led Light. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The most popular renewable energy is solar energy as it is free and clean. The energy produces by the sun can directly converted to electricity by using solar panel. Many projects or applications in this world are using solar energy as one of the sources and one of it is solar street light. Compare to the conventional street light, it depends on the power grid. When fault occur on the power grid, the street light unable to light on. Light Emitting Diode (LED) will use to replace the High Pressure Sodium (HPS) as the LED doesn't produce any pollution meanwhile HPS light bulb produce carbon monoxide because it has mercury in the bulb. Main purpose of this project is to design a street light system which is can minimize power consumptions by using the power from transmission line. This project will use PIC16f877 A as a main circuit it will control all the LEDs, Light Dependent Resistor (LDR) will control the light. Light Dependent Resistor are very useful in sensor circuit as the resistivity depends on the amount of light hit on its surface. In order to control the brightness, Pulse Width Modulation (PWM) will be used as it is the simple method. During day light, the LED will not be turn' on as the Light Dependent Resistor (LDR) has lower resistivity. When the day become darker (night), the LDR have a high resistivity. Hence, the LED will turn on for only 10% brightness when no movement of vehicle or pedestrians. In this project, there two Passive Infrared (PIR) motion sensor that will be used to detect vehicle movement. The first sensor will be placed a/few meters away from the first light pole and the second sensor will be placed a few meters after the last light pole. As the first sensor detect any vehicle movement, the LED will turn on 100% and at the same time, the sensor will count until 30 second after the vehicle pass through the last pole of Passive Infrared (PIR) motion sensor. As the last vehicle pass through the last sensor, the LED will tum on 10% brightness. This system able to save power consumptions as it only operate 100% when there is a vehicle approach.

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