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Split42

A split by Dominic Holifield: the Split42 with a single controller and I/O expanders.

KBD.news
Published August 22, 2025
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The Split42 by Dominic Holifield (aka dholifield/Dominic59) is a clever true split keyboard driven by a single Seeed XIAO RP2040 controller, combined with PCA9505 I/O expanders.

Features

  • 42 keys (6x3+3)
  • low-pro Choc V2 switches, soldered
  • Seeed XIAO RP2040
  • PCA9505 I/O expanders
  • 3D-printed case
  • KMK firmware

Pic:

Resources

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Published on Fri 22nd Aug 2025. Featured in KBD #197.

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