I learned recently that Charlieplexing is kind of like the discrete version of the Radon Transform: https://en.wikipedia.org/wiki/Radon_transform https://en.wik

I learned recently that Charlieplexing is kind of like the discrete version of the Radon Transform: https://en.wikipedia.org/wiki/Radon_transform https://en.wikipedia.org/wiki/Radon_transform