Smoke Detection using MQ-2 Gas Sensor Kit

Project Description

In this project, you will build the sensor Analog output voltage and when the smoke reaches a certain level, it will make sound a buzzer and a red LED will turn on.

When the output voltage is below that level, a green LED will be on.

Pin Connections:

• Connect sensor A0 pin to Arduino A5 pin
• Connect sensor GND pin to GND
• Connect sensor Vcc pin to Vcc
• Connect buzzer +ve to Arduino pin 10
• Connect buzzer -Ve to GND through 221ohm resistor
• Connect +ve pin of Red led to Arduino pin 12
• Connect -ve pin of red led to GND through 221ohm resistor
• Connect +ve pin of Green led to Arduino pin 11
• Connect -ve pin of Green led to GND through 221ohm resistor

Circuit Diagram

Applications

• Detects or measure Gases like LPG, Alcohol, Propane, Hydrogen, CO and even methane
• Air quality monitor
• Gas leak alarm
• Safety standard maintenance
• Maintaining environment standards in hospitals

Package Includes

• 1 x Arduino Uno
• 1 x Uno cable
• 1 x MQ-2 Smoke detection sensor
• 1 x Breadboard
• 1 x Male/male jumper wire
• 1x 5mm LED Red
• 1 x 5mm LED Green
• 1 x Buzzer
• 3 x Resistor 221ohm
• 1 x 9v battery
• 1 x Battery snapper connector

Tutorial Link

Smoke Detection using MQ-2 Gas Sensor