Cistercian Monk's cypher digital clock.

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The Cistercians, a Monk order from the 13th century, created a number cypher that was able to map from 0 to 9999 using a single digit.
This clock uses a 5x7 LED display to represent the Cistercian numbers to show the time using either the hh:mm format (00:00 to 23:59) or decimal time (0000 to 9999 intervals, work in progress).
The clock is also capable of representing the current day and month using a distinct pattern of dots on the matrix.

From Wikipedia article  The Cypher of the Monks:

The Cistercian numeral system, a numeral system that was used by the Cistercian order of monks in the 13th to 15th centuries of the Middle Ages, and has been used sporadically since then. It allowed writing numbers from 1 to 9999 as single compound characters.

The Cistercian numbers can be represented in a 5x7 dot matrix display, thus providing 4 digits to represent the time on a digital clock.

The Day and month can be represented using a distinguishable dot pattern

  • 1 × Arduino Nano Microcontroller board
  • 1 × DS3231 Clock and Timer ICs / Real-Time Clocks
  • 1 × SBM 4057 ASR 4 inch 5x7 led matrix, common anode
  • 5 × 33 Ohms THT resistor, 1/4 Watt
  • 2 × B3F-4000 Switches and Relays / Switches

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Ken Yap wrote 03/08/2021 at 01:31 point

Wow, that representation is so compact and arcane. 👍 Would make a good random alarm clock. Will be certainly be awake by the time one has worked it out. 😺

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danjovic wrote 03/09/2021 at 20:42 point

Like the Einstein clock right? But doesn't take too long to start to reading the numbers naturally and indeed that was something that amazed me on the Cistercian numbering system.

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Ken Yap wrote 03/09/2021 at 21:57 point

If you rotate the display 180° you would be able to read it from MSD to LSD, R to L though. Is that considered a blasphemous modification?

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danjovic wrote 03/21/2021 at 02:12 point

Yes, rotating the display would turn me into an heretic, lol!

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