Keyboard Builders' Digest
Save 5% at Divinikey! Code: KBDNEWS
Keyboard Builders' Digest / Projects

Underset

A spartan split keyboard with some considerable pinky offset: Underset by humanplayer2.

KBD.news
Published February 24, 2026
150,000 readers. 54 supporters. Help keep kbd.news free - like RGBKeys, Micah Alpern, and Daniel Nikolov.

The Underset by Rasmus K. Rendsvig (aka humanplayer2) is a spartan 52-key column-staggered split keyboard with aggressive pinky stagger and keys partially underset the ring column for a three-key curved pinky cluster. Both RP2040-Zero and TRRS underset the switch plate for simple cases that still isolate the electronics.

Underset is in the family of 4-row column-staggered split keyboards, like e.g. Dygma Defy, Elora, Go60, Iris, Lily58, Silakka54, Sofle, ZSA Voyager, and many others. This family contains both the luxurious, the feature-rich, and the unadorned. Underset falls in the latter category, inspired by the wonderfully simple Silakka54 – Rasmus.

The keyboard was designed using Ergogen.

Features

  • wireless split
  • 52 keys (6x4+3-ish)
  • MX switches, hotswap or soldered
  • nice!nano v2.0 controller
  • reversible PCB
  • TRRS
  • 3D-printed case
  • Vial/QMK firmware

Pic:

Resources

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

Published on Tue 24th Feb 2026. Featured in KBD #207 (source).


Related

Tom's 3x6 board

A Piantor-derivative by Tom Strowger. 36-key low-pro alu split keyboard driven by wireless XIAOs.

rae-dux

Andrew Rae's rae-dux, a 36-key wire- and diodeless split keyboard, built by u/melze.

The Chaotist

Tschibo's idea manifested as an astonishing open-source PCB: Chaotist is an ergoish 40% keyboard.

Ki board

Another wooden board, this time with a surprising layout: groyer418's Ki board.

Laptop replacement keyboard

A tented laptop replacement keyboard by kevinfrei.

×
top