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Developing a D-20 Watch for Tabletop Roleplaying Games
The germ, so to speak, for Timestop and the D-20 watch came out of the pandemic. I was running a makerspace, playing D&D, and doing some small electronics projects with my kids. I was spending a lot of time with people who liked games and making things. The initial idea was extremely broad: some kind of electronic
Fittingly, the watch’s STN (Super Twisted Nematic Fluid) display is made using photochemical etching, the same manufacturing process as the PCB that drives it. For the workslike prototype, we used through hole components on a breadboard, a stock display (timekeeping only, no rolling yet) and focused on how the heck to drive an LCD for years on a tiny coin cell battery. Now that we were adding more firmware functionality, we pretty quickly found a number of problems with our development board (like putting the buttons on non-interrupt IO pins).
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