Use an MQ-3 alcohol sensor as a breathalyzer and display the user's BAC.
How to build a device for estimating blood alcohol content from a breath sample. Developed with Zerynth and an ARM board.
SENSE is a Smart Open Source Breath Analysis Device that can accurately predict the blood alcohol levels in your breath!
Let us create a simple breathalyzer with LinkIt One microcontroller.
A customizable breathalyzer that tells you how much you've had to drink
Fun hobby project for building entirely open source breathalyzer with MQ-3, Arduino sketch for ANAVI Gas Detector and a lot of LEGO bricks.