16-05-2012, 12:20 PM
Automatic Room Light Intensity Detection and Control Using a Microprocessor and Light Sensors
Abstract
In this project we propose a design using both a microcontroller and light
sensors for automatic room light detection and control. Our design, the HLCM (home
light control module) which will be installed in every light fixture of a family, is made
up of three blocks: the Infra Red sensor circuit, the light sensor circuit, the
microprocessor and the RF module. By using the Infra Red sensor circuit, the HLCM
detects if a human body enters the detection area or not. If there is no human body
present, all controlled lights are turned off. If there is, the HLCM detects the light
intensity under the environment and maintains sufficient light by controlling the
number of lights. We can also integrate an RF module to transmit and receive the
data from each HLCM so we can control different lights in different regions. The
result of using the HLCM shows that the total power consumption can be reduced.
We can also have the number of persons in the room and the speed control of fan
with respect to temperature can also be included.