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Watch face design

A project log for 17 O Clock

A watch using roman numbering system with just 17 LEDs.

mclienmclien 2 days ago0 Comments

(about 2018, I guess)

The first intention was just some watch with those runes as the numbers, not much more. As I was hosting the website for the makers of the comic, I asked them if it was just some random scribbling or if there was a design of a whole alphabet and numbers. Turned out it was an alphabet but no numbers. So they came up with the idea of using the Roman numbering system. As I wanted to have some "glow" affect, LEDs are somewhat inevitable.

As the roman system uses lower values in front of higher for subtracting, the letters need to be sorted in a way, that all numbers can be displayed  the resulting row looks like this:

XLXXIXIVIII for minutes, XIXIVIII for hours. You could of course use the common trick to Display hours an minutes sequential, but as I wanted something resembling a watchface, I went for "hours top, minutes bottom".

At this point I was of the impression that a minimum of 19 LEDs was necessary, which I'll proofed wrong later (will be in the according log)

Here is a graphic of the idea (displaying 13:37):

red "LEDs" for the hours, orange for minutes. Same with the runes from the comic:

(green ones are the spare 5 LEDs, which I filled with some of the other runes ( H,B for Humbug and Binky the makers of the comic, And TOP, Tales of Pylea, the name of the comic)

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