Arduino: Digital Indicator of Alcohol Content

Tag Archive: breathalyzer.
Arduino: Digital Indicator of Alcohol Content.
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Projects — Leave a comment August 29

2010 This project refers to an Arduino sketch that implements the logic of a digital indicator of alcohol content.
This system can be used as a device for breath test.

There is the MQ-3 sensor in the system to detect alcohol

A suitable multi-LED bar graph (which is driven by a 8-bit shift register 74HC595) is used as an indicator rating the alcohol content.
If the alcohol content is high, then a tune is produced through a suitable piezo speaker.
Finally, there are two buttons in the system for functions such as ON, OFF and a LED which is the operation indicator.

Continue reading Tags: 74HC595

, bargraph, breathalyzer, button, , MQ-3 sensor, , piezo speaker, sketch Read More & Comment.
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