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Etilotest

Ciucu Ovidiu Andrei 1222A

Introduction

This alcohol tester provides a convenient and portable solution for individuals to monitor their alcohol consumption levels. It can be used for personal use or in situations where alcohol testing is required, such as safety checkpoints or professional settings.

General Description

The alcohol tester made with an Arduino Uno board, an MQ-3 sensor, a button,a buzzer, and an LCD display is a device designed to measure alcohol concentration levels. It provides a simple and convenient way to determine if an individual is sober, within legal limits, or drunk. The MQ-3 sensor is used to detect the presence of alcohol in the surrounding environment. When the button is pressed, the device initiates a 5-second countdown.A buzzer produces a sound every second to signal the measurement period. The sensor readings taken during this time are then processed to calculate the average alcohol concentration. Instead of displaying the results on the serial monitor, an LCD display is used to provide a user-friendly output. The LCD screen is connected to the Arduino Uno board via an I2C module, which simplifies the connection and communication between the two.Once the sensor reading is complete, the calculated alcohol concentration value is displayed on the LCD. The display provides different messages based on the concentration level. If the concentration is below a predefined sober threshold, the LCD displays "Sober" along with the measured value. If the concentration is within the legal limit, it shows "Have been drinking" And if the concentration exceeds a predefined drunk threshold, it displays "Drunk" as an indication of intoxication.