Arduino Breathalyzer Project using MQ3 alcohol sensor 0.96' 128x64 OLED display on Arduino Mega - YouTube
Alcohol Level Meter Breathalyzer using Arduino & MQ-2/MQ-5/MQ-135 Sensor - YouTube
Homemade breathalyzer MQ-3 gas sensor with Arduino PPM BAC g/L meter
Building a Breathalyzer with MQ-3 and Arduino - Daniel Andrade
GitHub - oneguyoneblog/Arduino-breathalyzer-DIY-alcohol-tester-with-MQ-3-gas-sensor-and-OLED-display: This is the code I use for a simple olcohol detector or "breathalYzer", using an Arduino Uno, MQ-3 gas sensor, OLED display and a couple of LEDs.