Oliver Thurley's Tempest is an open-source split keyboard with some nice splay.
KBD.news Published June 17, 2025
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The Tempest is a 36-key wireless ergo split keyboard with some splay, designed by Oliver Thurley (aka thrly/Background_Reporter9).
Really like my corne, but wanted a little splay and more thumb reach. There's loads of excellent alternative designs out there, but I wanted my own and had a lot of fun designing/building this myself! – Oliver.
Specs
36 keys (5x3+3)
low-profile Choc V1 switches, hotswappable
pinky and ring column splay
nice!nano or Pro Micro controller
reversible PCB
3D printable case
ZMK
Despite the footprint for it, there is no working display on the current version (1.1). The display header pins are not connected correctly. You could probably hand-wire the holes to the microcontroller pins to fix though.