Arduino Security Prototype

This project implements an ultrasonic radar system using Arduino for hardware control and Processing for visualization. The system scans surroundings by rotating a servo motor with an ultrasonic sensor and displays detected objects on a radar interface.

Preview video (youtube): Simple Arduino Security Prototype

Features

• 180° area scanning using servo motor rotation
• Distance measurement using ultrasonic sensor
• Sound detection capability
• Light-dependent activation (LDR sensor)
• Visual (LED) and audio (buzzer) warnings
• Timeout warning system with button reset
• Real-time radar visualization interface

Components

• Arduino board
• Ultrasonic sensor (HC-SR04)
• Servo motor
• Sound sensor
• Light Dependent Resistor (LDR)
• LED
• Buzzer
• Button
• Connecting wires

Files

• main.c - Arduino code for sensor control and data processing
• radar.java - Processing code for the radar visualization interface

Setup Instructions

1. Connect components to Arduino according to defined pin configuration in main.c
2. Upload main.c to Arduino board
3. Set the correct serial port in radar.java (currently "COM5")
4. Run the Processing sketch to start the visualization

How It Works

• The system activates when sufficient light is detected by the LDR
• The servo rotates between 15° and 115° continuously
• Distance is measured at each angle position
• Warnings are triggered when objects are detected within 10cm (can be adjust) or loud sounds are detected
• A timeout warning activates after 5 minutes of operation
• The button resets warnings and timeout

Board and Scheme