The Nano is one of our smallest boards, and as YouTuber Craft Channel has proven, it’s tiny enough to act as the brains of a wristwatch. This DIY wearable device features a nicely made wooden enclosure, with power supplied by a 1S 300mAh LiPo battery, and the face itself shown on a 1.3″ ST7789 display.

Its lack of a real-time clock unit, along with a fairly limited battery, means that the watch will only work for a short time before needing attention. However, creator Craft Channel notes that the build is an experimental project, and it’s a great demo of what can be done with a short bill of materials and a bit of ingenuity!