Pretty much all smartphones come with a clock app. This app allows users to create timers, countdowns, and alarms. It’s simple and it works, or at least it does for phones other than the iPhone.

When [Rodrigo Feliciano] realized that the reason his seven-segment LED wall clock wasn’t working was because the original TG1508D5V5 controller was fried, he had a decision to make. He could either ...