V. Durgabai¹ | B. Srinu² | P. Triveni³ | Dr. K. Lakshmi Bhavani? 03 04 This project presents the design and implementation of an Ultrasonic Radar System using the Arduino Uno buzzer and the HCSR04 Ultrasonic Sensor The system is developed to detect objects and determining parameters such as distance position direction speed and range which can be either in fixed or to be in motion The ultrasonic sensor emits highfrequency sound waves and receives the reflected echo from objects The Arduino Uno calculates the distance using the echo timeofflight principle A servo motor rotates the sensor from 0 to 180 to scan the area and the measured distance and angle data are displayed on a computer as a radarlike visualization If the object is detected then the buzzer sound will be activated This system provides a simple costeffective and efficient method for realtime object detection and distance measurement It can be applied in obstacle detection robotic navigation security systems and automation projects The project demonstrates the practical use of embedded systems sensor integration and realtime data visualization Copyright (c) Journal of Engineering Technology and Sciences. All rights reserved 2026