This system smart house helps you to upgrade your safety standards, completely statutory requirements on environmental commitments and most important and basic function being prevented accidents and protect life and property from disaster. In the past and even today, it has been a conventional practice to employ combustion apparatus such as a furnace, heater, stove in kitchen, which utilizes a combustible vapor or gas to produce heat energy when properly ignited.
In this kit the data coming from the gas sensor and temperature sensor is given to the microcontroller continuously. The microcontroller reads the data and processed it to check for gas leakage and high temperature conditions. Here MQ-6 sensor is work on basics of combustion process, and output is given in variable voltage form, so, when LPG gas is leakage voltage at the output pin of MQ-6 is increased and we Op-amp LM324 as a comparator for compare the LPG leakage with respect to normal condition.
Output of comparator is fed to microcontroller (ATMEL 89S8253) and corresponding coding LCD is display gas leakage and activate buzzer. Temperature sensor DS18B20 is continuously communicated with Microcontroller and display temperature at LCD. If temperature is more than threshold then fire alarm is activated and display fire on LCD.