Circuit Design with Arduino

Introduction: Circuit design is a fundamental aspect of electronic engineering, and it plays a crucial role in creating various electronic systems. This article aims to provide an informative and instructive guide on circuit design using Arduino. Arduino is a popular open-source electronics platform that offers a versatile and user-friendly environment for creating interactive projects.

Project: For this example, we will create a simple temperature monitoring system using Arduino. The objective of this project is to measure the temperature and display it on an LCD screen. This system can be used in various applications such as home automation, greenhouse monitoring, or industrial control.

Components Required:

1. Arduino Uno - 1x
2. LM35 Temperature Sensor - 1x
3. LCD Display (16x2) - 1x
4. Breadboard - 1x
5. Jumper Wires - As required

Examples:

1. Connect the LM35 Temperature Sensor to Arduino:

   • Connect the VCC pin of the LM35 to the 5V pin of Arduino.
   • Connect the GND pin of the LM35 to the GND pin of Arduino.
   • Connect the OUT pin of the LM35 to the A0 analog input pin of Arduino.

2. Connect the LCD Display to Arduino:

   • Connect the VCC pin of the LCD display to the 5V pin of Arduino.
   • Connect the GND pin of the LCD display to the GND pin of Arduino.
   • Connect the SDA pin of the LCD display to the A4 pin of Arduino.
   • Connect the SCL pin of the LCD display to the A5 pin of Arduino.

3. Read and Display Temperature on LCD:

   
   #include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); // Initialize the LCD display

void setup() { lcd.begin(16, 2); // Set the LCD display dimensions lcd.print("Temperature:"); // Display initial text }

void loop() { int sensorValue = analogRead(A0); // Read the analog value from LM35 float temperature = (sensorValue 5.0 / 1023) 100; // Convert the analog value to temperature

lcd.setCursor(0, 1); // Set the cursor to the second line of the LCD display lcd.print(temperature); // Display the temperature value lcd.print(" C"); // Display the temperature unit delay(1000); // Delay for 1 second before updating the temperature }