Simply connect the Sensor's output to any digital pin on the Arduino and check for a high pulse; if the Arduino reads a high pulse, Gas has been detected; if the Arduino reads a low pulse, no Gas is ...

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MQ-2 gas sensor can not only detect gas or smoke, but can also detect LPG, Alcohol, Propane, Hydrogen, Methane, and Carbon Monoxide.For interfacing, we are using the 5V and GND pin of the Arduino UNO ...