If you do not know about LED and ultrasonic sensor (pinout, how it works, how to program ..), learn about them in the following ...

This project uses an Arduino Uno, equipped with two ultrasonic sensors, a Liquid Crystal Display and a button, into a Theremin ...

[Klaus] wanted some sort of aid for parking his car, and after running across a $4 ultrasonic sensor, decided to build his own ...

Abstract: A simple robotics project simulated in Tinkercad based on Arduino Uno. It uses ultrasonic sensors for obstacle ...

Abstract: The design of a “third eye for the blind,” which employs ultrasonic waves to detect surrounding obstructions and ...