Breath Analyzer MQ3 Sensor With Arduino UNO

MQ3 sensor can detect Alcohol, Ethanol, Smoke concentration in the air. There are many projects like Gas level over-limit alarm, Breath analyser, Portable alcohol detector, Stand-alone/background sensing device or Environmental monitoring equipment.

In this project, i am going to show you how i made a breadth analyzer using MQ3 sensor and display the readings on LCD and raise an alarm if alcohol content is more than required in the breath of the user.

I have used a perfume in this project to check whether my project is working or not. You can use many other things like sanitizer, nail paint remover etc and check the result.

1. Arduino UNO - https://amzn.to/32jAMUA

2. Buzzer - https://amzn.to/3k8PGTG

3. LCD - https://amzn.to/35VXFQl

4. MQ3 sensor - https://amzn.to/32RZoUU

5. Jumper wires - https://amzn.to/3iqdBxM

6. 220 ohms resistor - https://amzn.to/2ZuPNRN

7. 10K potentiometer - https://amzn.to/3kGtUHn

You can also add LED also instead of a Buzzer.