Gas Detector Using Arduino

Introduction:

In this article I will explain how to detect gas using Arduino Mega. The gas sensor can easily find gas leaking at a place. When the gas is detected it can measure the range of the gas sensor.

Parts

• Arduino Mega 2560
• Gas Sensor
• Buzzer
• Bread Board
• Led
• Hookup wires.

Connection:

Step 1: Connection from the Gas Sensor to the Arduino Mega 2560,

Figure 1: Gas Sensor

• Take the Output pin to the Analog pin of the A0 in the Arduino Mega board.
• Take the Vcc pin to the +5v of the ArduinoMega board.
• Take the Gnd pin to the Gnd of the ArduinoMega board.

Step 2: Connection from the LED to the Arduino Mega2560

• Postive pin = 10;
• Negative pin = Gnd;

Step 3: Connection from the Buzzer to the Arduino Mega2560

• Take the positive pin and connect to the Digital pin of 05 to the Arduino Mega board.
• Take the negative pin and connect to the Gnd of the ArduinoMega board.

Programming:

const int sensorpin = A0; // sensor output pin to Arduino analog A0 pin
int led = 10;
int buzzer = 5;
int sensorValue = 0;
void setup()
{
    pinMode(led, OUTPUT);
    pinMode(buzzer, OUTPUT);
    Serial.begin(9600); //Initialize serial port - 9600 bps
}
void loop()
{
    Serial.println("Welcome to c#corner");
    sensorValue = analogRead(sensorpin);
    Serial.println(sensorValue);
    if (sensorValue < 100)
    {
        Serial.println("LPG Value");
        Serial.println("LED on");
        digitalWrite(led, HIGH);
        digitalWrite(buzzer, HIGH);
        delay(1000);
    }
    digitalWrite(led, LOW);
    digitalWrite(buzzer, LOW);
    delay(sensorValue);
}

Explanation:

• When the gas is detected the LED will be ON and the Buzzer also produced the sound.
• Then we can see the reading in the serial monitor.
• When the Gas is detected the LED can be HIGH.

Output:

Serial Monitor:

                                             Figure 2: serial Monitor Display

Output:

                                                      Figure 3: Output

 

Read more articles on Arduino:

• Working With MQ5 Gas Sensor
• Getting Familiar With Arduino IDE