Home > Embedded Systems, Projects > Arduino: Digital Indicator of Alcohol Content.

Arduino: Digital Indicator of Alcohol Content.

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.

Below there are some pictures of the project:

Digital Indicator of Alcohol Content – 1.

Digital Indicator of Alcohol Content – 2.

Digital Indicator of Alcohol Content – 3.

For more information you can get the project itself:

`alcohol_breathalyzer_via_mq3_piezo_led_bargraph

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