Keyboard Builders' Digest / Projects
Corne V4
The Corne V4, this latest iteration of foostan's iconic split, comes with on-board MCU.
Published March 29, 2024
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Kosuke Adachi aka foostan published his new Corne V4 PCBs, both MX and the most recent Choc variants.
I don't think this iconic split keyboard needs an introduction. The Corne or Crkbd, originally based on the Helix and MiniDox, is a 3x6 (or 3x5) column staggered split which has inspired many other designs during its 6 years in existence.
Version 4 is PCBA-ready via on-board RP2040 MCU, and offers some new layout variants given you can put a display, extra keys or encoders in the inner columns.
I intentionally abandoned backward compatibility to achieve technological advancement and design updates. Changes include fine-tuning the key pitch, MCU alteration, TRRS jack and LED design improvements, the addition of expansion options, and the introduction of a new dedicated case – foostan.
V4 specs
- 42-46 keys (3x6 or 3x5 split layout, 3 thumb keys)
- MX or Choc (different PCBs)
- hotswap (soldered version will be released later)
- snap-off outer column
- on-board RP2040 MCU
- USB-C connector
- optional inner rotary encoders or extra keys
- optional display
- per-key RGB
Major design changes (from v3)
- Change in pitch: from 19mm to 19.05mm
- Departure from Pro Micro: RP2040 on the PCB
- Change in TRRS jack parts
- No more underglow: for cost reduction and simplification
Resources
Published on Fri 29th Mar 2024. Featured in KBD #160.
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