Split keyboard

SPlitty

An ergonomic ortholinear split keyboard made to be low profile yet enjoyable and comfortable to use. It features a 6 column by 3 row layout similar to the Corne ergo keyboard but instead with a full width bottom "thumb cluster" that hopefully helps in moving from a traditional keyboard to a split ergo thumb cluster. This is mostly based around many of my current workflows being based around using CMD CTRL and ALT together on my mac so I wanted a way to reliably (no mod tap/hold on home row) press all of them while pressing all the other keys. I have an absolem/voyager style sticking out thumb cluster which allows for a more natural open hand. I wanted to make this project to help with the uncomfortable ergonomics of my desk that make me hunch forward to my keyboard whereas I'd rather my arms be further apart.

<img src=assets/full.png alt="full" width="500"/>

Features

• Ortholinear
• Column staggered
• 48 keys
• Pinky splay
• 128x32 OLED Displays
• Customizable tilt with tent legs
• ZMK Firmware
• Low Profile Choc Linear Switches
• Wireless
• Hotswappable

CAD

Uses a mix between a floating tray mount (resting on top of pillars) and a floating integrated plate on a lip to get the benefits of rigidity from tray mount without being too rigid and also alignment from plate.

<img src=assets/left-cad.png alt="Left" width="500"/> <img src=assets/right-cad.png alt="Right" width="500"/>

Made in Onshape.

PCB

Made in Kicad

Schematic

<img src=assets/schematic.png alt="schematic" width="500"/>

PCB

<img src=assets/left-pcb.png alt="pcb" width="500"/> <img src=assets/right-pcb.png alt="pcb" width="500"/>

Firmware

Uses ZMK and is customizable to do whatever you want pretty much. Set up to work with ZMK Studio. By default has 4 layers: the default qwerty layout layer, a numpad & function keys layout, a symbols layer, and a nav layer with mouse movements.

BOM

(If anyone could help source cheaper materials it would be greatly appreciated)