Arduino based Smoke detection and Alarm System | Simple Arduino project.

This project uses MQ2 gas sensor, which is an analog sensor. This sensor puts out a value between 0 to 5V when it reacts with the surrounding gases.

The user can hardcode a threshold value while programming depending on their requirement. Once the sensor reads a value greater than threshold value, the alarm goes up.

You can visit my Github repo for circuit diagram and code.