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@pjacock@fediscience.org · 3 weeks ago

My first under 10x10cm #MechanicalKeyboard PCBs arrived from JLCPLC - and they’re so tiny! Smol keyboard time - 15 or 16 keys on each half, and a 5-way navigation button, but no diodes using #GraphTheory http://astrobeano.blogspot.com/2025/12/5-way-switch-in-diode-free-graph-theory.html - and in further boundary pushing it should take a pair of #RaspberryPi RP2040-Zero or RP2350-Zero in TRRS wired mode, or the NRF52840 “Zero” controllers for Bluetooth (using opposite sides of the PCB rather than jumpers as they have almost equivalent footprints): https://codeberg.org/peterjc/pico-keyboards/src/branch/main/bivvy16d

Left and right PCBs for a tiny split keyboard (in red) overlayed on an old full size IBM multimedia keyboard (in dark grey)

pico-keyboards

My mechanical keyboard designs

5-way switch in a diode-free Graph Theory keyboard

My first post about keyboards introduced the idea of Graph Theory applied to keyboard wiring . I have since used the girth 8 Tutte-Coxeter G...

Bastian Greshake Tzovaras and 1 other boosted

@pjacock@fediscience.org · 3 months ago

And then there were two: This post was typed on my phone using my first self built Bluetooth #ErgoMechKeyboard, running on battery power with #ZMK firmware: the Gamma Omega Hesse. Like my other #MechanicalKeyboard designs this has a diode-free PCB using #GraphTheory. https://github.com/unspecworks/gamma-omega/tree/main/hesse

2 media

Small 36-key mechanical keyboard in a black resin 3D printed case with Chosfox CFX square keycaps in black (home row and thumb keys), orange (top and bottom on left), and robin blue (top and bottom on right). The middle thumbs have a 1.25u keycap, as do the S&L keys (could do this at D&K instead), which fit because these are slightly smaller than the Kailh Choc keycaps this case was designed for. The index and pinky home keys have a homing bumb.

Two small black keyboards, on the left with a USB cable the wired only Gamma Omega TC36K (with purple MKB keycaps), and on the right showing a reset button and USB port on the top edge, the wireless Gamma Omega Hesse (with blue, black, and orange CFX keycaps).

@pjacock@fediscience.org · 3 months ago

And then there were two: This post was typed on my phone using my first self built Bluetooth #ErgoMechKeyboard, running on battery power with #ZMK firmware: the Gamma Omega Hesse. Like my other #MechanicalKeyboard designs this has a diode-free PCB using #GraphTheory. https://github.com/unspecworks/gamma-omega/tree/main/hesse

2 media

Small 36-key mechanical keyboard in a black resin 3D printed case with Chosfox CFX square keycaps in black (home row and thumb keys), orange (top and bottom on left), and robin blue (top and bottom on right). The middle thumbs have a 1.25u keycap, as do the S&L keys (could do this at D&K instead), which fit because these are slightly smaller than the Kailh Choc keycaps this case was designed for. The index and pinky home keys have a homing bumb.

Two small black keyboards, on the left with a USB cable the wired only Gamma Omega TC36K (with purple MKB keycaps), and on the right showing a reset button and USB port on the top edge, the wireless Gamma Omega Hesse (with blue, black, and orange CFX keycaps).

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