A clock using the antique technology of "nixie tubes," which are similar to vacuum tubes or CRTs. I had to source the tubes from former Soviet countries (specifically, Ukraine and Moldova). All of the circuitry (except the boost converter--the tubes require 200V!) was designed by me. Most of the boards were laid out by me, and some I milled in-house at MIT MakerWorks (due to complexity and fine details, others were sent out for fabrication). The clock has several modes, runs on an Arduino with an RTC for timekeeping, and is in a laser-cut case. The largest difficulty I encountered was probably working with old electronics that don't solder well--I had to design pin-mounts for them. This clock won the 2018 MakerCup.

The most valuable output of this project, though, was that as I did this, I created the guide for MakerWorks in PCB manufacture and masking.