Hello students! I hope you are doing great. Today, I am going to share a reliable sensor that is widely used to sense the air quality in different types of projects and circuits. The increasing ratio of pollution in the air is alarming, and air quality monitoring systems are the need of the time. The MQ135 can detect and measure a wide range of gases around it and present the output in the form of digital or analogue values.In this article, we will commence by providing a fundamental introduction to this sensor, outlining the target gases it is designed to detect. Following that, an exploratio ...