#5 CONCEVOIR DE A à Z UN SYSTEME DE RADAR A TRAVERS ARDUINO

Introduction

This tutorial guides you through the process of building a radar system using Arduino. Aimed at hobbyists and students, this step-by-step guide will help you understand the components, wiring, and coding required to create a functional radar system.

Step 1: Gather the Necessary Components

To get started, you'll need to collect the following components:

• Arduino board (e.g., Arduino Uno)
• Ultrasonic sensor (e.g., HC-SR04)
• Servo motor
• Jumper wires
• Breadboard
• Power supply (if needed)

Practical Tips

• Ensure your Arduino board is compatible with the ultrasonic sensor and servo motor.
• Organize your workspace to keep components easily accessible.

Step 2: Set Up the Wiring

Follow these steps to wire your components:

1. Connect the ultrasonic sensor:

   • VCC pin to Arduino 5V
   • GND pin to Arduino GND
   • Trig pin to a digital pin (e.g., pin 9)
   • Echo pin to another digital pin (e.g., pin 10)

2. Connect the servo motor:

   • VCC pin to Arduino 5V
   • GND pin to Arduino GND
   • Signal pin to a digital pin (e.g., pin 11)

Common Pitfalls

• Double-check all connections to avoid miswiring, which can damage components.
• Ensure the ultrasonic sensor is positioned correctly for accurate distance measurements.

Step 3: Download the Required Software

You will need a couple of software tools:

• Arduino IDE: To upload your code to the Arduino board.
• Processing: For visualizing the radar data.

Download Links

• Arduino IDE
• Processing

Step 4: Write the Arduino Code

Create a new sketch in the Arduino IDE and use the following code as a starting point:

#include <Servo.h>

Servo myServo;
const int trigPin = 9;
const int echoPin = 10;

void setup() {
  Serial.begin(9600);
  myServo.attach(11);
}

void loop() {
  long duration, distance;
  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;

  myServo.write(90); // Adjust as needed for your setup
  Serial.println(distance);
  
  delay(500);
}

Practical Tips

• Modify the angle in myServo.write() to adjust the servo motor's position.
• Test the code with the serial monitor to ensure distance readings are accurate.

Step 5: Visualize Data with Processing

Using Processing, you can visualize the distance measurements from your radar system. Download the Processing code from the provided links and upload it to your Processing environment.

Code Snippet Example for Processing

import processing.serial.*;

Serial myPort;
float distance;

void setup() {
  size(800, 600);
  myPort = new Serial(this, "COM3", 9600); // Change "COM3" to your port
}

void draw() {
  if (myPort.available() > 0) {
    distance = float(myPort.readStringUntil('\n'));
    background(255);
    ellipse(width/2, height/2, distance, distance);
  }
}

Common Pitfalls

• Make sure to set the correct COM port in the Processing code.
• Adjust the visualization parameters as needed for clarity.

Conclusion

You have successfully built a radar system using Arduino! By following these steps, you learned how to gather components, set up wiring, write code, and visualize data.

Next Steps

• Experiment with different sensors or visualization techniques.
• Share your project with the community or seek feedback to improve your design.

Feel free to explore the links provided in the video description for additional resources and support. Happy building!