One Up Chuck Keyboard

I haven't had a non-split ergonomic keyboard before, so I thought I'd give one a try, but none of the existing boards had what I wanted. Hence: the One Up Chuck.

Features

• 30 key wireless split ergo keyboard with aggressive pinky stagger and splay
• Seeed Studio XIAO BLE microcontroller (probably also works with the XIAO RP2040)
• Gateron Low Profile hotswap switches
• 7mm low-profile "snug sandwich" case with no exposed components on top or bottom
• RGB LED status visible on the top of the case
• Wireless-first design using ZMK firmware (including ZMK Studio)
• PCB designed with ergogen
• Internal space (5.3 x 22 x 32 mm) for a "large" 502030 250mAh battery
• Licensed under the CERN Open Hardware License v2
• All source files available, so you can tweak the design if needed

Design goals

• Low cost wireless
  • xiao ble is only $10 per controller compared to $25 for the nice!nano
  • Big battery and an option for a dongle, so you can run for months without recharging
• Ergonomic design for the ultimate comfort
  • each half is angled to match the angle of the hands on the board
  • keys are placed where fingers naturally fall, with no excessive stretching
    • when fingers extend, they splay, so the keys also splay outward to follow the fingers
    • the pinky is shorter than the other fingers, so the pinky keys are placed lower to match, and the top pinky key is traded for a ring finger key
    • the inner column of each hand is reduced to two keys
    • only one thumb key for each hand
  • centrally located rotary encoder knob for easy access to scrolling and volume control
  • includes all source files, so if your fingers are slightly different, with a little work you can adjust the keyboard to fit you exactly
• Low profile 3D printable case
  • case is only about 7mm high and comes in two separate pieces, each largely flat on one side for easy FDM printing with minimal fuss
  • smaller versions are included for smaller print beds
  • a few different knobs are included so you can get the height that works best for you
  • bumpons are inset into the case 1mm to minimize their height; they add only 1/2mm in height
• Hotswappable
  • keycaps and switches can be easily removed and exchanged so you can fine tune the feel
• Electrostatic protection
  • unlike other ultra-low-profile cases, no electronics are exposed on either the bottom or the top of the case
  • on the side of the case, the reset button and power switch are available, and the usb port is accessible

Still in its infancy, but the Build Guide is started.