Implementation of a Smart Security Light Control System

Abstract

The conventional way of controlling the security light in a developing countries like Nigeria are offline by manually turning ON or turning OFF the lighting system by the home owner. This practice is ineffective as it frequently results in the wastage of energy if the user forget to turn it off. Due to this limitation, there is need to design a system of security lightning control system that will switch ON automatically during darkness while notifying the user through motion such as ultrasonic sensor. Hence this project concentrates on the design and putting in practice a smart security lightning control system for notifying the user through buzzer while minimizing the energy wastage. The project consists of a PIC16F877microcontroller, an ultrasonic sensor, relay and light dependent resistor (LDR). The PIC16F877 microcontroller is used for controlling and switching off the buzzer through a relay. The buzzer acts as a notification, relying on the signal from the ultrasonic sensor, and it employs the PIC16F877 microcontroller, into which the operation is programmed. The smart security lighting control system casing was locally fabricated having a dimension of (7 X 10 X 15) cm. Following the casing, the measured findings are as follows: light dependent resistor (LDR) is 1012 ohms, source voltage is 220V (A.C), while the Microcontroller voltage falling within the VCC and GND including the buzzer voltage between pin VCC (2) and GND (5) is 4.93V and 4.91V respectively. The distance of 100cm was set as the reference value to be captured by the ultrasonic sensor while sounding alarm for 60 seconds indicating the presence of an intruder. The device's ability to acts as smart security notification by home users has been proved in this project.