Tag Archives: breathanalyzer


Arduino based breath analyzer

This is a simple breath analyzer based on a gas sensor (MQ-3 from Sparkfun) that is highly sensitive to alcohol. The author demonstrates how to interface the gas sensor to Arduino to sense the content of alcohol in your breath.

This project does not display the numeric value of the alcohol concentration on any LCD, but it has a series of 11 LEDs (green through red) that gives the strength of the alcohol content.

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