DIGIRULE 2U: an 8-bit computer on your ruler
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Published on ● Video Link: https://www.youtube.com/watch?v=T8EBLxSNnZE
Just a quick video in case you've not seen this before - there's much better videos about this neat little, Aussie-designed rule.
I backed it on Kickstarter - you can buy the already-built rule on Tindie or build-your-own from the freely available files on Github.
It comes with eight built-in programs, and you can program your own either via the buttons on the rule a-la Altair, or compiling & uploading via your computer.
https://github.com/bradsprojects/Digirule2U
https://bradsprojects.com/digirule2/