You can learn Arduino in 15 minutes.

Arduino Tutorial 1: Setting Up and Programming the Arduino for Absolute Beginners

Arduino Course for Beginners - Open-Source Electronics Platform

MAAG ultrasonic welding equipment — ultrasonic metal tube sealing machine

Arduino ultrasonic haptics science project

THE ULTRASONIC DISC THAT EVAPORATES WATER

Arduino Uno Q SBC: Exciting New Features for Projects

Build a 5 DOF Robot Arm Using Arduino Nano

Part 20 | Arduino Clock Beginners Project