Now with more LED. Arduino mega powered breathalyser using the MQ-3 sensor.   A relative gauge for judging how intoxicated you are. NOT TO BE USED AS MEANS OF BREATHALYZING NEVER DRINK AND DRIVE. This is more of a device to encourage one to drink more. The MQ-3 can't achieve the accuracy to register exact BAC. And It behaves weirdly. Sensitive to temperature and humidity. This is purely for fun. Links http: ...