Klein keyboard is a 36 keys, columnar staggered, split keyboard named after Felix Klein

• Column Staggered
• Bluetooth compatible with power switch
• Seeed Studio XIAO / Pro Micro / nice!nano / kb2040 compatible
• Hotswap MX and Choc switches support
• Trackpad support with FPC cable and direct wiring
• Reversible SMD and through hole diode footprint

Supports multiple options of micro controller and sensors.

Broadly divided in two types:

• Can be made with Seeed Studio XIAO-BLE
• Supports either rotary encoder or OLED
• Battery connectors JST and THT

Wireless touchpad is currently not supported in ZMK.

• With any Pro Micro based boards
  • Can support encoders, OLED, Touchpad, Buzzer and Haptics

PCB with both Choc and MX switches

Low Profile Choc version

MX version

.
├── BOM
│   ├── BOM-3235-SEEED.csv         <- BOM
│   └── ibom.html
├── Case
│   └── *.stl                      <- Case stl Files
│   └── Prototype                  <- FreeCad project files (Not tested)
├── docs
│   └── images
├── Logo
├── PCB
└── README.md

It is available in BOM directory as csv file and interactive HTML BOM

• Wired build guide
• Wireless build guide

• Add Build Guide
• Add Touchpad related 3D Models
• Software support for Touchpad/OLED

• ZMK shield for Klein with rotary encoder support. Keymap is just for test modify accordingly.
• QMK Firmware for Pro Micro with touchpad support. Keymap is just for test modify accordingly.

These projects inspired and helped in making Klein:

• Lily58 (Hotswap Footprints)
• Dilemma (Trackpad Mount, Design)
• KLOR (Haptics Footprints, Design)
• Claw44 (Design)