Ultrasonic distance meter with Arduino and HC-SR04

A short demo/tutorial demonstrating how to assemble a simple ultrasonic distance meter. Components needed: 1. HC-SR04 ultrasonic sensor 2. LCD I2C 16x2 display 3. Breadboard 4. 8 x F/M wires, 2 x M/M wires 5. Arduino UNO R3 or its clone (Elegoo UNO in my case) Source code is here: