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


Daniel Haarhoff shared his neuro36, a small 36-key split travel keyboard.
Published September 13, 2023
Creators! Feel free to tip me off about your keyboard related projects to bring them to 120K readers.

The neuro36 by Daniel Haarhoff (aka erkannt/mit_verlauf) is a small 36-key split keyboard optimized for travel.

I wanted a keyboard I could travel with. I need 36 keys and like to have larger keys to rest my thumbs on (probably due my journey having been Ergodox -> gergo) – Daniel.

With its low-profile case and switches, and the nice Chicago steno thumb caps, the neuro36 has definitely reached this goal.



  • 36 keys
  • low profile, Choc-spaced
  • hotswap or soldered (on main 30 keys)
  • reversible PCB
  • Seeed XIAO RP2040 MCU
  • remaining pins broken out on right hand (hope was to add trackball)
  • low-profile printed case
  • press-fit travel protector
  • thumb keys can be soldered in either orientation

Pic: Silkscreen with real neurons (EM image taken by the author's partner)

Silkscreen with real neurons (EM image taken by the author's partner)

The case is printable without supports, however, the travel protector needs them. Make sure you have good bed adhesion as a warped print will give you a wobbly case. Other than that:

I picked a very small diode footprint by accident. I'd suggest going for something larger if you are up for tweaking the KiCAD project – Daniel.


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

Published on Wed 13th Sep 2023. Featured in KBD #135.



Two new CircuitPython boards by u/SouthPawEngineer, called the Caduceus.

Mantis v0.2

Felix Kuehling's Mantis v0.2, sporting HEX keycaps, has now PCBs on two levels to imitate tenting.

Ergonaut One

Ergonaut One is a split with KS33 switches released by the newly formed team of Ergonaut Keyboards.


Hotreus62 was shared by leo_beekeeb – a 60% hotswappable keyboard that supports both low-profile Choc and MX switches.

Atreis PCB

Atreis PCB by Jesus Climent.


The Fanta-Manta by Protieusz is a resurrection of the closed source Manta by rainkeebs.