In Development
MNML and Chiisai represent the next chapter for Clickety Split: cleaner integration, fewer separate modules, thoughtful wireless design, and a continued focus on practical split keyboard hardware.
MNML has now moved beyond its initial fabrication and prototype-testing stage. The 3×5, 3×6, and 4×6 versions have completed major hardware and firmware validation, and work is now focused on the remaining steps toward initial availability.
Chiisai continues to develop alongside MNML as the controller platform for future Clickety Split hardware and compatible keyboard projects.
Availability will be announced once hardware, production, and launch preparations are ready.
MNML
MNML (pronounced Minimal) is Clickety Split’s next generation of integrated wireless split keyboard hardware.
Instead of building around separate controller and display modules, MNML brings more of the keyboard electronics directly onto the PCB. The goal is a cleaner, more complete keyboard platform while keeping the feel, layout philosophy, and build experience that shaped earlier Clickety Split designs.
MNML is being developed in three layout sizes:
MNML 3×5
A compact, minimal split layout for builders who prefer a smaller key count and a focused typing experience.
MNML 3×5 keeps the design intentionally lean while still supporting the integrated wireless hardware direction that defines the MNML family.
MNML 3×6
A slightly wider version of MNML for those who prefer an additional column while keeping the same compact split keyboard feel.
MNML 3×6 offers a familiar balance between small form factor, layout flexibility, and integrated wireless design.
MNML 4×6
A larger MNML layout for builders who want more keys while staying within the same integrated hardware family.
MNML 4×6 is intended for those who prefer a little more room in their layout without stepping away from the direction of MNML.
Chiisai
Chiisai is a compact wireless controller-style board being developed for future Clickety Split projects and compatible keyboard builds.
Many custom keyboards have traditionally been built around small Pro Micro-style controller boards. These boards provide a familiar way to add a microcontroller to a keyboard PCB, but wireless builds often require additional design considerations around battery charging, USB-C, power routing, protection, and firmware support.
Chiisai is being designed for that space: a small, practical controller-style board that keeps the familiar integration path while bringing more of the supporting electronics into the board itself.
Built around the nRF52840 platform, Chiisai supports Bluetooth Low Energy (BLE), wireless keyboard operation, and ZMK firmware. It is intended to provide a clean foundation for wireless keyboard projects without requiring the keyboard designer or builder to solve as many of the surrounding hardware details separately.
Chiisai also incorporates practical protection mechanisms intended to improve durability and reliability, including protection for VBUS, USB-C data lines, RESET, and reverse-current protection for 3.3V Out (VCC).
Chiisai is designed to support the next stage of Clickety Split hardware while remaining respectful of the open keyboard ecosystem that helped make these projects possible.
Current status
MNML 3×5, 3×6, and 4×6
Major hardware and firmware validation is complete across all three MNML sizes. Production USB identities, wireless operation, displays, power systems, ZMK firmware, and ZMK Studio support have been validated across the family.
The MNML 4×6 enclosure has also completed its first physical fit test successfully. Work is now focused on the remaining steps toward initial availability.
Chiisai
Current Chiisai hardware has been received, and development and validation continue as the platform moves toward future Clickety Split projects and compatible keyboard builds.
Firmware platform
Clickety Split’s migration to the current ZMK module architecture is complete. MNML, Leeloo, Leeloo-Micro, and Pepito are now supported through the public zmk-clickety-split external module and maintained configuration templates.
More details, photography, specifications, and availability information will be added as MNML and Chiisai move toward their next milestones.
Questions about upcoming designs, compatibility, or existing Clickety Split builds are always welcome through the Contact Us page.