Arduino Components for Multisim: Interfacing an Alcohol Sensor

The use of sensors in various applications has become increasingly popular due to their ability to detect and measure specific conditions or parameters. In this tutorial, we will explore how to interface an alcohol sensor with Arduino, a widely used microcontroller platform.

The circuit diagram for this project is provided above, and it illustrates the connections made between different components. A push button is used to start taking readings from the Alcohol Sensor connected at digital pin D6 of the Arduino board. The LCD connections are similar to those found in Arduino's LCD examples, which are available in the IDE (12, 11, 5, 4, 3, 2). The output from the alcohol sensor is connected to an analog pin on the Arduino board (A0).

To compare the output voltage of the alcohol sensor with a preset voltage, we have designed a comparator circuit. This circuit is optional and uses an LM358 IC for converting the alcohol level sensor output into digital data. A buzzer is also used in this project to indicate high levels of alcohol.

The 16x2 LCD display is used to show the PPM value of the alcohol detected by the MQ3 sensor, which is a key component in this Arduino alcohol detector shield. The MQ3 sensor detects the present level of alcohol in the breath and allows for calculations to be performed using code to determine the alcohol level in both breath and blood.

This project uses an Arduino shield designed by JLCPCB, which can detect alcohol levels in the breath and trigger an alarm using some simple calculations in the code. The PCB design was created using EASYEDA's online PCB simulator and designer.

In this tutorial, we will focus on interfacing the alcohol sensor with the Arduino board, providing a comprehensive guide for beginners and experienced users alike.

Arduino componenets for multisim