Intelligent Ultrasonic Obstacle Detection and Real-Time Audible Warning System

This project employs an Arduino Nano, HC-SR04 ultrasonic sensor, and buzzer to create an intelligent obstacle detection and warning system. The ultrasonic sensor continuously measures the distance between the system and nearby objects. When an object enters a predefined safety zone, the Arduino Nano activates the buzzer to provide an immediate audible alert. Powered by a 9V battery, the system is portable, energy-efficient, and suitable for collision avoidance, blind-assistance devices, parking guidance systems, robotic navigation, and industrial safety monitoring applications.