Keyboard Builders' Digest / Projects
Underset
A spartan split keyboard with some considerable pinky offset: Underset by humanplayer2.
Published February 24, 2026
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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
Resources
Published on Tue 24th Feb 2026. Featured in KBD #207 (source).
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