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38. DESIGN AND DEVELOPMENT OF AUTOMATIC CONTROL DEVICE FOR SWITCHING LIGHTING SYSTEM USING ENERGY EFFICIENT PHOTO SENSOR by Onyeoru, H.C. Volume 51 (May, 2019 Issue)
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DESIGN AND DEVELOPMENT OF AUTOMATIC CONTROL DEVICE FOR SWITCHING LIGHTING SYSTEM USING ENERGY EFFICIENT PHOTO SENSOR

Onyeoru, H.C.

Department of Electrical and Electronic Engineering, Delta State University, Abraka, Nigeria.

Abstract

This paper presents the Design and Construction of an Automatic Control Device for Switching Lighting System using an Efficient Energy Photo Sensor and a Microcontroller Device for efficient energy utilization. Hitherto, the control of home/industrial lights has been done by manual switching. The high number of switching operation of these lighting systems make the manual control inefficient in the present day of scarce energy resources. This work therefore seeks ways to automatically put ON lights when needed, and put them OFF when not needed without any physical human operation. In the design of this work, the entry and exit of persons into an environment is used to control lighting system. The hardware design consists of the entrance, exit and environment lighting sensor unit, Driver/power (opto-coupler) unit, and as well as the control unit and it is designed around a microcontroller which forms the heart of the system. A Light Dependent Resistor (LDR) is used as a sensor, which senses the entry and exit of people to either turn ON or OFF the lights. The LDR is interfaced with the microcontroller through a comparator and a Laser Diode which produces a red beam of light to the LDR. The Drivers and the Power units enable the lighting Systems to be powered from an AC source through a DC control signal. Results from tests carried out both in software simulation and hardware implementation showed that light control can be done effectively within an environment without the intervention of human control with a considerable energy consumption reduction.

Keywords: Light Dependent Resistor (LDR), Laser Diode (LD), Entrance/Exit Sensors, Environmental Sensor, Load (Electrical Appliance), Drivers/Power Switch.

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