Arduino + MQ3 = alcohol breath tester
This the season for good cheer, and what can be more cheerful than a project that’s as much fun to use as it is to build? How about a homebrew alcohol breath tester? Daniel Andrade shows how to build just such a device using just an Arduino, MQ3 alcohol sensor and a handful of resistors and LEDs. While this project is for academic and experimental purposes only, we suggest testing its calibration often.This entry was posted in Arduino, measurement and tagged alcohol, Arduino, breathalyzer, MQ3 sensor.