MQ-2 gas sensor using gas sensitive material is to be clean air in the lower conductivity of Tin oxide (SnO2). When the sensor when flammable gases are present in the environment in which the sensors conductivity with increasing concentration of combustible gas in the air increases. Use a simple circuit to convert the changes in Read more about MQ-2 MQ2 Smoke Gas LPG Butane Hydrogen Gas Sensor Detector Module fr Arduino AVR[…]