An ARM-7 based embedded energy efficient LED lighting system for domestic applications with user satisfaction

Now-a-days, it is more of a win-win than ever to save on energy. Every time we lower our utility bills, we put more money back in our bank account and lower energy bills also means less energy consumed, which means less harmful emissions released into our environment. To make our homes more energy efficient, one of the least expensive and most effective changes that we can make is replacing the light bulbs. Hence this project proposes an intelligent house hold LED lighting system to make the house energy efficient and user satisfied. The proposed system utilizes multi sensors and wireless communication technology in order to control a LED light according to user´s state and surroundings. An ARM 7 based embedded system design with day light and PIR sensors will be attempted to control the lighting and its intensity in a household environment. The wireless communication technology uses zigbee and RS-485 protocol for serial communication. The proposed system after implementation will be verified for its performance against a conventional system and the percentage of energy saving will be calculated.