From 7f8dcf85b00522a64fb5fc632db3ce73261c95fd Mon Sep 17 00:00:00 2001 From: Peter Cock Date: Mon, 16 Jun 2025 11:49:30 +0900 Subject: [PATCH] Link to wikipedia page for Tutte-Coxeter graph --- keyboards/tutte_coxeter_36k/readme.md | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/keyboards/tutte_coxeter_36k/readme.md b/keyboards/tutte_coxeter_36k/readme.md index 6ce04bed..dd70acc6 100644 --- a/keyboards/tutte_coxeter_36k/readme.md +++ b/keyboards/tutte_coxeter_36k/readme.md @@ -2,11 +2,13 @@ ![Partial Tutte-Coxeter Graph (26/30 vertices, 36/45 edges)](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvS5QfAl7YotptMtpu0nG8XOHOsqG2vocUFF2sRgrn_QwAcUQNhDkctHt_42rQor3Bb5tbAW6FiOsYqv2craP086HMTuAqWk9U0A4yOeEsQkhyphenhyphenUxoayJWf5e-N3_Jg1TC1p9YAiVPTK02pEVCUu3hl72REIk5BAjXgZGoF7T-NWQ28iRirwFs6yzFzAe0/w200-h194/Screenshot%202025-05-28%20at%2014.59.35.png) -This is firmware for an PR2040 monoblock 36 key design (three rows of five, and three thumb keys, for each hand). -This is a *diode-free* design using a sparse 13 by 13 scanning matrix designed from a partial Tutte-Coxeter graph +This is firmware for an Raspberry Pi Pico PR2040 controller monoblock 36 key design +(three rows of five, and three thumb keys, for each hand). This is a *diode-free* +design with a sparse 13 by 13 scanning matrix designed using a partial +[Tutte-Coxeter](https://en.wikipedia.org/wiki/Tutte%E2%80%93Coxeter_graph) graph (using only 26 vertices or GPIO pins with 36 edges or keys - see this [blog post](https://astrobeano.blogspot.com/2025/05/ergo-mech-keyboard-wiring-using-tutte-coxeter-graph.html) -for background although the final pin selection changed). +for background, although the final pin selection and trace routing changed). The first physical PCB for this is designed to fit in the [Gamma Omega keyboard](https://github.com/unspecworks/gamma-omega) case, and use the same Raspberry Pi Pico based microcontroller board.