“This is actually a project I did quite a while ago (the git repository goes back to September 2014), when the WS2812 LEDs became really popular and ubiquitous. Naturally, I had to get a 5 metre strip of them as well, to play around with them. And what would you do with them? A clock of course! At the time, I was also very much against just throwing an Arduino at it and being done with it, because I thought even that would be overkill. (Though it actually started as a real-time clock module for an Arduino Nano.) I had made an alarm clock before and knew, that the Arduino wasn’t doing anything most of the time, since I’d be using at dedicated real-time clock chip. The Arduino would most of the time just be idling and waiting for the interrupt, generated by the clock chip. And I also wanted to learn to design and manufacture my own PCBs. dermeb already did that several years ago, when he designed, etched and build BlinkenLED displays. So we still had the basic chemicals sitting in the basement waiting to be used again.”