Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I ...

Over on Soldering Station, they show you how to build your own countdown clock. In order to build this, you’ll need an Arduino, a switch, a display, some housing, and a few other parts.

Open the Arduino software and paste the Arduino code (the text in the box near the bottom of the post) into a new sketch. Click Sketch > Verify / Compile to make sure the code is properly in there.