🚀 Radar System using Arduino

[shirshanag]

🛰️ Overview

This project implements a Radar System using an Arduino, Ultrasonic Sensor (HC-SR04), Servo Motor, and I2C LCD Display.
The system continuously scans the surroundings using a servo-mounted ultrasonic sensor and displays the angle and distance of detected objects in real-time on the LCD.

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⚙️ Features

• 🔄 Servo motor sweep from 0° → 180° → 0°
• 📏 Real-time distance measurement
• 💡 Clear LCD display output
• 🧠 Beginner-friendly and well-commented code

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🔌 Hardware Connections

Component	Arduino Pin	Description
Servo Motor	D3	PWM Signal
Ultrasonic Trig	D9	Trigger Pin
Ultrasonic Echo	D10	Echo Pin
LCD SDA	A4	I2C Data
LCD SCL	A5	I2C Clock
Power	5V, GND	Power Connections

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🧩 Libraries Used

• Servo.h
• Wire.h
• LiquidCrystal_I2C.h

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🧠 Working Principle

1. The servo rotates the ultrasonic sensor from 0° to 180°.
2. The HC-SR04 sensor measures the distance of nearby objects.
3. The LCD displays both the angle and distance (in cm).
4. The process repeats continuously to simulate a radar scan.

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🧾 Output Example

Angle: 90°
Dist: 22 cm

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📦 Future Improvements

• ⚠️ Add LED/Buzzer alert for close obstacles
• 📊 Visualize radar scan on PC or serial monitor
• 🌐 Send data to IoT dashboard (ThingSpeak / Blynk)

✅ Status: Ready for Review
✅ Tested on: ESP32
✅ Simulation Support: Optional (Tinkercad / Wokwi)

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🧑‍💻 Contributor: @shirshanag