Construction of an intelligent and efficient light control system

Abstract

A lighting control system is an intelligent connection of lighting that control the amount of light in a given space. It provides interaction between systems in order to regulate light. It is mostly used in public buildings in order to save energy maximally from lighting system and to satisfy codes of buildings. The problem of expensive cost in lighting system, increase in energy consumption bills and energy wastage led to the introduction of smart lighting. Therefore, an intelligent and efficient light control system that saves energy and cost of energy consumption of light in our day to day activities for rooms was assembled. Passive infrared sensor combined with the light dependent resistor was used to control the luminous intensity of led from the comparator (ATMEGA328) comparing the values gotten from the two sensors as input such that when the value of luminous intensity gotten from the light dependent resistor is higher than the required intensity, then the led remains off. When the value of luminous intensity gotten from the light dependent resistor is lower than the required intensity, the led supplies light that will make up for the missing intensity. It is deduced that, as the intensity of light increases, the resistance of the light dependent resistor decreases. It is also observed that the luminous intensity increases as the time of the day increases i.e. As the laboratory light intensity decreases. Thus, the system functions efficiently as the energy is considerably conserved.