Flammable Gas & Smoke Sensor MQ-2 Brick Kit

Product Description

This is a brick component specially design for the Arduino board and is suitable for detecting the concentrations of combustible gas in the air and ouputs its reading as an analog voltage. The sensor can measure concentrations of flammable gas of 300 to 10,000 ppm.The sensor can operate at temperatures from -20 to 50°C and consumes less than 150 mA at 5 V. It has a high sensitivity and fast response time.

This brick component si different than your usual brick so the most important thing is that you NEVER connect the VCC pin to the 5v pin on the Arduino board because the curent drown will most likely distroy your Arduino, instead, you can use a 5v Voltage Regulator brick and connect a 9v power source to the Arduino board.That way the sensor will be powered from the external power source and not from the usb.

The GND pin on the left side of the 5v Voltage Regulator Brick should be connected to the GND pin on the Arduino board, the VIN pin on the left side of the 5v Voltage Regulator Brick should be connected to the VIN pin on the Arduino board.

The GND pin on the Flammable Gas Sensor Brick should be connected to the GND pin on the 5v Voltage Regulator Brick, the VCC pin on the Flammable Gas Sensor Brick should be connected to the 5v pin on the 5v Voltage Regulator Brick, and the OUT pin on the Flammable Gas Sensor Brick should be connected to a analog pin on the Arduino board.

This kit includes a specially designed PCB for the MQ2 flammable gas and smoke sensor, one 10Kohm resistor, one 10Kohm potentiometer used to adjust the sensor sensibility and a 3 pin header.

When it comes to interfacing this brick with the other components, we recommend using these jumper wires.

The source code is below:

void setup() 
{                
 Serial.begin(9600);
}
void loop() 
{
  int valoareAlcool = analogRead(0);
  Serial.print("Nivel alcool: ");
  Serial.println(valoareAlcool, DEC); 
  delay(100);
}

This kit requires soldering, just like in the video below.