What is Arduino? A cool and fun single board computer to learn electronics. Learn about Arduino and see it in action as Don Wilcher gives a hands-on demo of how to build an electronic 7-Segment LED Display Flasher. If you’ve ever wondered how electronics work, this is your opportunity. Don is the author of Learn Electronics with Arduino. He’ll introduce this DIY how-to book, and give an easy-to-digest taste of the world of electronics engineering.