My first post about keyboards introduced the idea of Graph Theory applied to keyboard wiring. I have since used the girth 8 Tutte-Coxeter Graph to build a 6KRO keyboard (the Gamma Omega TC36K), and several girth 6 graphs to build 4KRO keyboards (see table of girth 6 graphs for keyboards in this recent post). But what about other kinds of switches like 3-way jog dials (up/down/push) or 5-way directional buttons (up/down/left/right/push)?
I did a retrospective in August of how looking for a replacement keyboard led up to building a Ergonomic Mechanical Keyboard with a self-designed PCB roughly six month later (the diode-free Graph Theory based Gamma Omega TC36K). That design is beginner friendly, and went smoothly. In October someone else made a pair of them - nice!
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| A pair of Gamma Omega TC36K keyboards |
Up until now, I have had three different keyboard PCBs fabricated to my own design - all diode-free using Graph Theory. The Gamma Omega TC36K, the Gamma Omega Hesse, and the Forager Acid, with 36, 36 and 34 keys respectively. They've been getting smaller. Well now for something bigger, requested by our nine year old: They want a keyboard with more keys, and deserve smaller keys. Here is the Slump52!
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| Slump52 keyboard PCB design in KiCad |
