Each digit is made using one pair of Neopixel rings, stacked to form a figure of ... The rest of the build is pretty plain vanilla — an Arduino Nano clone, a DS3231 RTC, a Lithium battery ...

You can see a demo in the video below. The device uses an Arduino Nano, a Neopixel ring, an encoder, and a laser-cut enclosure that looks great. The minimal UI has several modes and the video ...