How do I connect MQ2 sensor to Arduino?

Interfacing of MQ2 Sensor with Arduino

  1. Connect the VCC pin of the sensor to the 5V of the Arduino.
  2. Connect the GND of the sensor to the GND of the Arduino.
  3. Connect the digital pin of the sensor D0 to the digital pin number 8 of the Arduino.
  4. Connect the analog pin of the sensor to the analog pin A0 of the Arduino.

How do you use a smoke sensor with Arduino?

There are 16 pins in the LED Display. Connect pin 1, 3, 5, 16 to the GND pin of the Arduino. Connect pin 2 and 15 of LED Display to the 5V pin of the Arduino. Connect pin 4 of Display to D7, pin 6 to D6, pin 11 to D5, pin 12 to D4, pin 13 to D3, pin 14 to D2 of the Arduino.

How does MQ2 gas sensor work with Arduino?

Using a simple voltage divider network, concentrations of gas can be detected. MQ2 Gas sensor works on 5V DC and draws around 800mW. It can detect LPG, Smoke, Alcohol, Propane, Hydrogen, Methane and Carbon Monoxide concentrations anywhere from 200 to 10000ppm.

How does a gas sensor work Arduino?

How does it Work? The voltage that the sensor outputs changes accordingly to the smoke/gas level that exists in the atmosphere. The sensor outputs a voltage that is proportional to the concentration of smoke/gas.

Which MQ sensor is best?

MQ-4 – Methane, CNG Gas As a natural gas sensor, the MQ-4 Natural Gas Sensor is a fast and reliable sensor with a high sensitivity to natural gas and methane, also good sensitivity to propane and butane. This natural gas sensor has a long life and low cost and is widely used for gas leak detection.

What is smoke sensor in Arduino?

MQ2 gas sensor is an electronic sensor used for sensing the concentration of gases in the air such as LPG, propane, methane, hydrogen, alcohol, smoke and carbon monoxide. MQ2 gas sensor is also known as chemiresistor.

Can IR sensor detect smoke?

Infrared and Ultraviolet flame detectors are used in areas where traditional smoke detectors would be prone to false alarms. Infrared beam smoke detectors are used to provide “wide area” smoke detection.

What is a MQ2 sensor?

The MQ-2 is a smoke and combustible gas sensor from Winsen. It can detect flammable gas in a range of 300 – 10000ppm. It’s most common use is domestic gas leakage alarms and detectors with a high sensitivity to propane and smoke.

Is gas sensor analog or digital?

analog
In other words, all gas sensors are analog. It is the addition of an on-board analog-to-digital converter that makes a digital gas sensor possible.

What is ppm for gas?

Parts-per-million, or “ppm”, is commonly used as a fractional unit of measure for concentration. As an example, a methane (molecular) concentration of 2% means that 2 out of every 100 air molecules is methane. Similarly, a methane concentration of 2 ppm means that 2 out of every 1 million air molecules is methane.