Introduction - YUQI1122/ECE387_Midterm GitHub Wiki

The goal of this project is to build a smoke detector use MQ2 gas sensor and compare the influence to the sensor made by different kinds of gas. The reason why I choose MQ2 gas sensor is the MQ serials gas sensor can sense almost the same kinds of gas. The difference of these gas sensors are they can sense the gas in different values. For example, the MQ2 sensor can sense alcohol, butane and smoke. The MQ5 sensor can also sense alcohol, butane, and smoke. But, MQ2 is more sensitive for smoke and butane and MQ5 is more sensitive for alcohol. Therefore, I choose MQ2 sensor to build a smoke detector. Also, the reason for I have to compare different kinds of gases is to make sure the smoke detector are in the right range and will not influence by other gases.