13Ultrasonic Range Finder
In this project we’ll create a simple ultrasonic range finder with a screen that displays the distance of an object up to 5 meters from the sensor.
HD44780 16x2 LCD screen
HC-SR04 ultrasonic sensor
HOW IT WORKS
The ultrasonic range finder sends out a burst of ultrasound and listens for the echo that bounces off an object. The Arduino sends out a short pulse on the trigger pin to send the ultrasonic burst, then listens ...