Classroom Monitoring and Energy Conservation System by Employing PIR Sensor

Present system relates to the designing of an energy conservation system that uses a Passive Infrared Radio sensor(PIR) for controlling light and fan when classroom is vacant. When anyone (human being) make an entry into the classroom, then the Infrared energy released by the human body is concentrated by a Fresnel lens section which triggers the ‘PIR’ sensors and the signal is transmitted to a microcontroller associated within the system. Once motion is sensed the relays comes into action and on the fan and light. The condition to turn on the operation fan is only the classroom reaches a value of temperature of 25 degree C-30 degree C.