Motivation

In recent years, camping and caravanning have become popular in Korea. Cooking in enclosed spaces produces carbonmonoxide, which could bring about suffocation. Carbonmonoxide (CO) is colorless and odorless, therefore, no one cannot perceive the change of it. When I found a CO sensor with arduino, a friend of mine who loves camping occured in my mind!

Components

• Arduino Nano

• Piezo Buzzer: Alaram

• MQ-9 Sensor Module: Carbon Monoxide & Flammable Gas Sensor

  The module is highly recommended!

Why Module?

Q. How to Measure?

The resistances ratio in the sensor changes depending on the gas concentration.