Date of Publication :7th September 2015

Abstract: This paper gives an idea about the measurements of room temperature with the help of LM35 sensor. Also it is detect the presence of human beings inside the room with the help of PIR sensor while LDR is used to sense the intensity of environmental lights. These entire sensors are connected with the microcontroller AT mega 32. If the intensity of environmental lights falls below the set points, artificial lights inside the room will be turn on. Otherwise remain it will be turn off. Similarly is the temperature of the room fall below a particular set point, the heater will be turn on, if the temperature raise above a particular set point the heater will be turn on and fan will be automatically turn on, so as to maintain a desired temperature inside the room. it is work only in the presence of human being only. So, in the absence of human being the system will be turned off. Thus, there will be no wastage of electricity and hence the power. Resulting a saving in electricity bills .

Reference :