INTRODUCTION
The MQ-3 is an alcohol gas sensor that is available for about $5 from Sparkfun, Seeed Studio, and others. It’s easy to use and has sparked the imagination of anyone who has dreamed of building their own breathalyzer device for measuring the amount of alcohol in the human body.
HARDWARE REQUIRED
- ARDUINO UNO
- MQ-3 Alcohol Detector Sensor
ABOUT THE SENSOR
Description: This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC.
Features:
- 5V DC or AC circuit
- Requires heater voltage
- Operation Temperature: -10 to 70 degrees C
- Heater consumption: less than 750mW
Dimensions:
- 16.8mm diameter
- 9.3 mm height without the pins
Documents:
PIN CONFIGURATION
SOFTWARE REQUIRED
- ARDUINO IDE
SCHEMATICS
NOTE: I prefer to use a breakout board or module instead direct attaching the sensor with Arduino.
HERE IS THE LINK : BUY ONE FOR YOUR PROJECT
DOWNLOAD FULL SOURCE CODE AND OTHER FILES FROM HERE
HAPPY INTERFACING
TECEX
INTERFACE ME! 