A 3D printed ergonomic keyboard project, fully designed and built from the ground up.
This is my third iteration on custom keyboards, here's my previous project.
The CAD design is fully open source and available at OnShape for free.
- Highly optimized for being printable on desktop FDM / FFF 3D printers.
- Two levels thumb cluster:
- First row (Ctrl & Alt) is lower than second row (Space / Shift).
- This allows pressing the second row naturally.
- Two parts split.
- Allows adjustment of angle to match wrists.
- 46 unique key cap designs.
- Horizontal and vertical concave surface for both right and left sides.
- Strategic bump marking at some keys for tactile feedback.
- Highly optimized keycaps printable locking mechanism makes it snap perfectly to Cherry MX switches.
- Solder free hot swappable Cherry MX switches.
- Uses libopncm3.
- Custom DFU bootloader:
- Enabled by pressing the reset button.
- Includes status display on OLED screen.
- Implements standard USB DFU specification from official documents.
- Main firmware:
- Passes all logical tests from official USB20CV compliance test tool for both USB and HID.
- Supports several USB HID usage pages (Keyboard/Keypad, Generic Desktop & Consumer), enabling several shortcuts.
- Layered layout support, allowing easy hardware mapping of alternate keyboard layouts (eg: Dvorak).
- Each key can be mapped to:
- USB usage page code.
- Go to next layer.
- Run C function.
- Send sequence of key presses.
- 128x128 color OLED screen
- Full USB status (reset, configured, suspended, remote wake-up).
- Full HID status.
- Keyboard "LEDs" (caps lock, scroll lock etc).
- HID report requency.
- Communication status between left / right side.
- Active layer (eg: qwerty, dvorak).
- Support for either Boot or report HID protocols: works on all BIOS.
- Remote wake up support.
- All 3D parts STL files can be obtained from OnShape and printed on a desktop FDM / FFF.
- SSD1351 color OLED 128x128 screen.
- STM32F411CEU6 "Black pill" board.
- USB-C Female breakout boards.
- USB-C Male Breakout board.
- Diodes.
- Kailh PCB Sockets.
- Cherry MX Silent Red.
- Screws.
- Keys stabilizers.
- Silicone pads.
- Tactile button.