Keyboards

Robert Mills karn

A DIY 38-key split, ortholinear, non-staggered keyboard using low-profile Choc switches, with 1.5u thumb arc keys; Karn-1 is wireless via a Nice-Nano-v2.

Some specs could not be matched to a source · Last verified: 2026-10-18

Robert Mills karn
Image: © Robert Mills (Manufacturer image)
Key layout
Image: QMK Firmware (Generated from QMK data (GPL-2.0))
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Where to buy

No US retailer found yet. Official site

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Pros

  • 1.5u thumb arc keys with the inner thumb key aligned to the homing column
  • Compact 38-key layout
  • Karn-1 is wireless over Bluetooth
  • Karn-2 uses a reversible PCB with no diodes, simplifying assembly

Cons

  • DIY build requiring soldering
  • Karn-1 needs tiny diodes soldered and is not for beginners
  • Karn-2 has no Bluetooth support

Specs

SplitSplit
StaggerOrtholinear
TentingNone
KeywellNo
Thumb clusterYes
Keys38
LayoutsCustom
SwitchesLow-profile
Hot-swapNo
FirmwareQMK
DIY kitYes
ConnectivityBluetooth
OSwindows, macos, linux
Released—
Sources
AD · detail-mid

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