MQ-5 Gas Sensor with Arduino UNO – Connection Diagram. Now that we understand how the MQ-5 gas sensor operates, we can connect all of the necessary wires to an Arduino Uno and test it out. We'll start ...

This project uses an MQ gas sensor and a buzzer with an Arduino Uno to detect gas leaks and issue an audible alert. The gas sensor is connected to analog pin A0. The buzzer is connected to digital pin ...

Gas-Leak-Detection-Alarm-System-using-MQ2-Gas-Sensor-Arduino. Use the diagram to connect the components accordingly. ... (A0) of the MQ-2 sensor to the A0 Pin of the Arduino. You can assemble the ...