Development of an energy efficient microcontroller based light control system for smart home application

Abstract

Automation is a demand in this era of information and communication technology where a smart control system is used to reduce or replace human operators in the industry, offices or homes. Home automation system is the subset of automation system that allows us to control household appliances like light, door, fan, air-conditioner etc. in an intelligent way. It helps handicapped and old aged people which will enable them to control home appliances and alert them in critical situations. It not only refers to reduce human efforts but also energy efficiency and time saving.

In this project work, a simple home automation device has been chosen to implement. It will sense the presence of human(s) by the motion sensor and according to its signal the electrical devices will be turned on/off. To do this, a simple PIR sensor has been used to detect the presence of humans. Also a light sensor devices (LDR) is use in this project. When there is less light in the environment LDR is detect and intensity of light in the room is increase. If there is less light in the environment then LDR is increase the room light intensity. A program code was being downloaded into the microcontroller. When the PIR sensor gives an input signal to the microcontroller, the microcontroller then gives an output signal to the relay module which then turn on the light connected to it. If PIR sensor doesn’t give any output signal which will be feed to the input of the microcontroller, then the relay has been turned off and so the light connected to it. Finally we got an energy efficient home automation system. In future we can apply this project in every spare of life and we also can include many feature like security monitoring system in this project.