I'd like to have a countdown timer in a presentation I'm doing on Monday. It could be the movie countdown style or just a digital clock face. But I don't know how to do it. Any ideas? I have Final ...

You have a timer and clock in just about every single device out there these days, but if you want to build you own, Instructables user GeraldF6 shows you how to do so with a Arduino.

John Boxall, author of the new book Arduino Workshop, shares a few of the projects from his book on how to get started with the microcontroller. (Click the links to see PDFs of the complete ...