Breath analyzer with OLED and MQ3 gas sensor

Hi, guy today we are going to make a breath analyzer which detects alcohol vapour. so, first you need to show how does the sensor work so, the sensor work with a chemical reaction with what it will tell you the readings. so, lets begin!!

Step 1: What You Need?

1 x Arduino UNO  

1 x USB Type-B Cable 
1 x OLED or LCD
1 x MQ-3 Gas Sensor 

Male-to-Male Jumper Wires 
Female-to-Male Jumper Wires
1 x Mini Breadboard or Breadboard
1 x Computer with Arduino IDE

Optional

Cable Cover
Arduino Compatible UNO Ultimate Starter Kit / Learning Kit
USB To Power Jack Cable

Don't have components? Don't worry. Just click the component's name. 

Step 2: Make A Shield For Arduino

1.The OLED ---VCC wire will go to 3.3v of the Arduino. GND will go to GND. SCL to A5. SDA to A4.

2.The MQ-3 gas sensor --- VCC to 5v. Gnd to Gnd. AD to A0.

Step 3: Upload The Code 

  

When you upload the code if it say warning up so then wait 15 mins if it give the reading it is working well. if check the code or your connections.

Thanks for watching!!!

Download:

Arduino IDE

Source: http://www.instructables.com/id/Breath-analyzer-with-OLED-lcd-and-MQ3-gas-sensor/?ALLSTEPS

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Author & Editor

My Robot Education Sdn. Bhd. (Robotedu.my) was founded in 2015 as the first robotics education centre in Malaysia to provide Arduino-based robotics courses for youths. Our vision is to be able to provide robotics education to every youth in Malaysia.