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PLUG Starter Kit For Arduino Project 17: Detect the alcohol content in the Air

Posted by Fiona Su on

In this project, you will learn how to use the alcohol sensor and control board to detect the alcohol content in the air.
Component Required

  • EASY plug control board*1
  • EASY plug Alcohol Sensor *1
  • EASY plug 1602 LCD Module *1
  • RJ11 cable*1
  • USB cable*1

Component Introduction
Keyestudio EASY plug Analog Alcohol Sensor

This analog gas sensor - MQ3 is suitable for detecting alcohol. It can be used in a Breath analyzer. Also it has high sensitivity to alcohol and low sensitivity to Benzine.
The sensitivity can be adjusted by a blue potentiometer on the sensor.

  • Power supply: 5V
  • Sensor type: Digital and Analog
  • Quick response and High sensitivity
  • Simple drive circuit
  • Stable and long service life

Connect It Up
Connect the EASY Plug analog alcohol sensor to control board using an RJ11 cable


Upload the Code


What You Should See
Done uploading the code, open the serial monitor and set the baud rate to 9600. If the sensor detects the alcohol in the air, you should see the value change.



Extension Experiment
Adding LCD Display
Hookup Guide
Connect the EASY Plug alcohol sensor and LCD module to control board using RJ11 cables.


Test Code
Below is an example code.


What You Should See


Upload success, you should be able to see the alcohol value is showed on the LCD screen.


If you can’t see the data clearly, you should rotate the potentiometer on the back of LCD display to adjust the backlight.


All Tutorial

 Buy here>>EASY PLUG Super Starter Kit For Arduino STEM EDU


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