Underset A spartan split keyboard with some considerable pinky offset: Underset by humanplayer2 .
KBD.news Published February 24, 2026
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 ).
Related An open-source split by
Christopher Hoage loosely based on the Ergodash:
Spleeb .
The
Chonky Palmtop by
Daniel Norris is a cyberdeck with an integrated Corne.
A 40% ortho split keyboard with parametric, tented case:
Zwerg by
floookay .
Christoph Rehmann 's
TPS42 is an open-source 36-42 keys split keyboard with trackpoint and memory LCD support.
Strange-Lab5541 has updated his handwired split with the retro keycaps:
fisk 2.0 is here.
About KBD.news is a blog and newsletter on DIY mechanical keyboards. A hand-picked selection of posts from a keyboard enthusiast's perspective (more + contact ).
Support this project! Discount codes for ya Newsletter Subscribe now!
Powered by Buttondown.
More meetups→
Latest issue Check the archive→
Latest switch summary
Check the best-selling switch archive→
Check the switch database→
Supporters splitkb.com , MoErgo Glove80 , Upgrade Keyboards , Cyboard , BeaverKeys , @keebio , Jacob Mikesell , Timo , KEEBD , TALPKEYBOARD , @kaleid1990 , ghsear.ch , Ben M , u/motfalcon , Bob Cotton , FFKeebs , @therick0996 , Christian Mladenov , Schnoor Typography , RGBKeys , Daniel Nikolov , Caleb Rand , Micah Alpern , James McCleese , zzeneg , Spencer Dabell , Anatolii Smolianinov , Stefan S. , Penk Chen , Clacky , Trey Causey , Dylan Ingham , Mario S. , Gordon Diggs , Cloyce , Duncan B. , HubertTheMad , Andres Sakk , barraGOUDA , Shnobble , Hating TheFruit , Ikasaya , Technofrikus , drudru , Dickiedyce , TurtleKeebs , TurkeyBoards , Filip Salo , Davidjohn Gerena , Chase M. , sungo , Derek Tam , s_p_l_o_d_e , beekeeb , Raphael S.
Toolkit
Keyboard Layout Editor , Plate Builder / Plate Generator , QMK / kbfirmware.com (to QMK ), Pro Micro pinout & upgrade
Community
r/mk , ErgoMech , r/mechmarket , geekhack.org , deskthority.net , keebtalk.com/ , lemmy/mk/ , lemmy/ergomech/ , kbin/mk/
Production
PCB design guide , another one , PCB price comparison , lasergist , laserboost , hubs.com .