Keyboard Builders' Digest
$5 off of ceramic caps at Cerakey!
Keyboard Builders' Digest / Projects


The VColChoc44 is an Atreus-like low-profile monoblock split by jpconstantineau with on-board RP2040.
Published October 16, 2021
Creators! Feel free to tip me off about your keyboard related projects to bring them to 120K readers.

My thinnest, most portable keyboard! – jpconstantineau.

This open-source keyboard, inspired by the Atreus and based on the PyKey60, features an on-board RP2040 and CircuitPython for easy keymap update.


  • 44 keys, low-profile Kailh Choc with hotswap sockets
  • on-board RP2040 controller with CircuitPython
  • 14 mm height from desk to top of keycaps
  • speaker/buzzer on board

Why did I create a custom board instead of using a Raspberry Pi Pico? The Pico wouldn't allow for the thinnest keyboard. Its position would need room below the PCB and thus would also need a bottom plate to enclose it all, defeating the whole point of an ultra-low profile keyboard.

Github repo:

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

Published on Sat 16th Oct 2021. Featured in KBD #48 (source).


Zaphod Lite

Pete Johanson published his Zaphod Lite, a hand solderable version of the original Zaphod – a feature-rich low-pro wireless monoblock split.

Ergo monoblock split

This is an ergo monoblock split by pencomp7 with an encoder and acrylic case.

Gleb's handwired one

Gleb Sabirzyanov posted his colorful unnamed unibody keyboard.

The Osprey keyboard

The Osprey is xapheau's open-source unibody ergonomic column-staggered keyboard.


Ajisai is a 58-key handwired monoblock wireless build by u/DCharlo.


Pteron56: Alexander's handwired build is based on FSund's design. Some new plates added to the project.