THE BIBA40
I couldn’t find the keyboard I wanted, so I built it.
I wanted a Planck-style 40% ortholinear keyboard that was split, wireless, and customizable. I couldn’t find one that brought all of those ideas together, so I started building my own.
The Biba40 is the result of many prototypes, adjustments, tweaks, and mockups. I make them in very small batches, and I’m happy to offer them to anyone else looking for the same kind of compact, flexible setup.
AT A GLANCE
Hardware and software.
A quick overview of what is inside the Biba40 and what its firmware can do.
Hardware
- Layout
- 48-key split 40% ortholinear
- Controller
- SuperMini nRF52840, one in each half
- Battery
- 600 mAh LiPo battery in each half
- Charging
- USB-C, with each half charged separately
- Dimensions
- To be measured
- Weight
- To be measured
Software
- Firmware
- ZMK open-source keyboard firmware
- Connections
- Bluetooth and USB output
- Bluetooth
- Five saved device profiles
- Layers
- Default, Lower, Raise, Adjust, and Function
- Mouse controls
- Movement, scrolling, and left or right click
- Customization
- ZMK Studio and Nick Coutsos’ Keymap Editor
WHAT MAKES IT DIFFERENT
Small footprint. Flexible setup.
The Biba40 combines a compact layout with the freedom to position and configure the keyboard around the way you work.
Compact & ortholinear
A space-efficient 40% layout with keys arranged in a straightforward grid.
Split & wireless
Position each half where it feels comfortable, without a cable running between them.
Made your way
Choose the printed-part colors, PCB, switches, keycaps, and hot-swap configuration.
CHOOSE YOUR BUILD
Hands-on kit or assembled for you.
Build the kit
Receive the keyboard parts completely unassembled and make the Biba40 your own from the ground up. Full technical and assembly documentation is available on GitHub.
Ready to use
Have your selected configuration assembled for you, with your switches and optional Mill-Max hot-swap sockets installed.
OPEN & ADAPTABLE
Designed to keep evolving.
The Biba40 runs on ZMK, open-source firmware designed for wireless keyboards. Its layout and layers can be customized, and the design files and technical documentation are publicly available for anyone who wants to explore further.
BUILD PREVIEW
Make it yours.
Explore the available colors, switches, keycaps, and build options in the interactive configurator.