This project outlines the development of an ultrasonic radar system using an Arduino Uno, an ultrasonic sensor (HC-SR04), and a servo motor. This radar can detect objects within its range and visualize them using Processing software.
โข Arduino Uno
โข SG90 Micro-servo motor
โข Ultrasonic Sensor - HC-SR04 (Generic)
โข Jumper wires
โข Hot glue gun (optional)
โข Arduino IDE (Integrated Development Environment)
โข Processing IDE
This ultrasonic radar system operates by:
The HC-SR04 sensor is attached to the servo motor using hot glue (or a more permanent method) to enable scanning in different directions.
The HC-SR04 connects to the Arduino Uno as follows:
โข VCC (sensor) to 5V (Arduino) โก
โข GND (sensor) to GND (Arduino)
โข TRIG (sensor) to pin 2 (Arduino) - trigger pin.
โข ECHO (sensor) to pin 3 (Arduino) - echo pin.
The servo motor connects to the Arduino Uno as follows:
โข Red wire (servo) to 5V (Arduino) โ power.
โข Brown wire (servo) to GND (Arduino) โ ground
โข Orange wire (servo) to pin 4 (Arduino) - control pin.
โข Defines a function to measure distance using the ultrasonic sensor's time-of-flight principle.
โข Implements a loop to continuously:
โข Rotate the servo motor from a start angle to an end angle (scanning range).
โข Measure the distance to any object detected by the sensor in its path.
โข Send this distance data to the Processing software.
โข Receives distance data from the Arduino via the serial port.
โข Visualizes the radar display based on the received distances:
โข Green lines represent no object detected (distance beyond a threshold).
โข Red lines represent object detected (distance within the threshold).
This project demonstrates the capabilities of Arduino in building a simple yet practical ultrasonic radar system. The project provides a valuable learning experience in interfacing sensors, motors, and software for real-world applications.