MQ135 Gas Sensor with Arduino
I forgot to mention that I added a buzzer you can see it on the breadboard …the sensor does not have one just a LED indicator
the sensor can be used to detect VOC Volatile organic compound and many TI`s report odours and having chemicals used in their homes I don`t really suffer from this so not really pursuing this project further but it might of interest to others that do to research VOC`s and air quality detectors etc.
https://microcontrollerslab.com/inter...
https://www.codrey.com/electronic-cir...