MQ-3 Alcohol Sensor Breathalyzer Gas Detector Ethanol for Arduino Rasp – eElectronicParts
The Talking Breathalyzer : 9 Steps (with Pictures) - Instructables
Building a Breathalyzer with MQ-3 and Arduino - Daniel Andrade
2 breathalyzer Projects - Arduino Project Hub
The Talking Breathalyzer. Part 2 - Schematic and connecting modules and shields, using the Breathalyzer in Portable Mode, Customizing the Breathalyzer in Portable Mode
An alcohol tester with LED lights made with Zerynth - Arduino Project Hub