Keyboard Builders' Digest
5% off of Invokeys' tasty switches!
Keyboard Builders' Digest / Projects


u/jammerkiai's KaRP2040 is an RP2040-Zero based unibody split keyboard.
Published March 14, 2023
Creators! Feel free to tip me off about your keyboard related projects to bring them to 100K readers.

The KaRP2040 is a basic no-frills 34-key, wired unibody split keyboard by Jon Mereria aka jammerkiai – sporting an RP2040-Zero module running KMK.

I spent some time traveling with the wireless split keyboard I built a few months ago. While I enjoyed using it, there were some situations where I thought having a wired unibody keyboard made more sense – jammerkiai.


  • Waveshare RP2040-Zero controller
  • 34 low-profile Kailh Choc switches
  • SMD diodes (SOD-123 1N4148)
  • CircuitPython, KMK


Do you like this post? Share, donate, subscribe, tip me off!

Published on Tue 14th Mar 2023. Featured in KBD #116 (source).



The open-source monoblock Crowboard by KeyboardDweebs has been around for half a year now. Better late than never.

Cockpit keyboard

Cockpit is a hotswap handwired monoblock split mechanical keyboard by ozkan.

NEC M-System

The NEC M-System was a Japanese input method and a series of word processor keyboards introduced in 1983. Posted by wj-zhe.

Lets Split case

Lets unite? A 3D printed monoblock case for the Lets Split by altapowderdog.


Kolibrimini is a 40% Alice-style keyboard with arrow cluster – designed by kreme11.

Silli41 & Silli18

Squalius-cephalus shared the Reviung-derivative monoblock Silli41, along with its numpad companion.