This LEDarcade clock runs on Raspberry Pi, features retro arcade games, and shows time in style. LEDarcade, which was designed from scratch without tutorials, offers nine different retro game titles.

With an inexpensive Raspberry Pi, you can add wireless Android Auto to older cars - ones that require a wired connection to your phone.

The hardware required is a Raspberry Pi Zero 2 W, a camera (in this case, a USB webcam), and something to hold it above the book.