Keyboard Builders' Digest
Save 5% at — discount code: KBDNEWS
Keyboard Builders' Digest / Projects

Pinci the keyboard

An ultra low profile 34-key build by sproutless with RP2040 and Rust firmware.

Published on September 30, 2021 by

Inspired by other open-source projects like the Ferris, Fifi and KeySeeBee, sproutless designed and built his own version of a low profile split.


  • Raspberry Pi Pico (RP2040)
  • 34 key layout with two thumb keys skewed outward
  • No diodes, direct switch-to-GPIO connections
  • Reversible PCB
  • Kailh PG1232 Low Profile Switches
  • TRS capable hardware (normal headphone cable)
  • Minimal SMD components and no THT components


The firmware is written in Rust using the Keyberon library (and more).

Git repo:

Published on Thu 30th Sep 2021. Featured in KBD #46 (source).


Protocol Seven

Protocol Seven, a monoblock split by PM_ME_YOUR_MAINFRAME with a numpad in the center comes with source files.


Lunakey project

The [x|Lunakey project] includes two open-source split keyboards and a macropad published by Yoichiro Tanaka.



Peregrine by SouthPawEngineer, a wireless ergonomic board with a built in trackpad module that can be removed and used separately.