Clickety Split | Chiisai

Small footprint. Big possibilities.

Chiisai is a compact, thoughtfully designed wireless controller built for custom mechanical keyboards and embedded electronics projects.

Powered by the Nordic nRF52840 SoC through the Fanstel BC840M module, Chiisai brings Bluetooth Low Energy connectivity, USB-C, integrated LiPo battery charging, and flexible power management together in a familiar Pro Micro-style form factor.

Designed with flexibility in mind, Chiisai features a software-controlled 3.3V output, allowing firmware to manage power to external peripherals and supporting power-conscious designs.

Whether you're building a minimalist wireless keyboard or exploring your next custom electronics project, Chiisai provides a capable, compact foundation.

Key Features

• Nordic nRF52840 Bluetooth Low Energy SoC with an ARM Cortex-M4F processor.
• Fanstel BC840M Module Compact, integrated wireless module.
• Pro Micro-Style Footprint Familiar form factor for custom keyboard and electronics designs.
• USB-C Connectivity Modern USB interface for power, communication, and firmware updates.
• Integrated LiPo Charging Onboard battery charging circuitry for portable, rechargeable projects.
• Software-Controlled 3.3V Power Dedicated regulated output that firmware can enable or disable to manage external peripherals.
• Additional GPIO Access Rear auxiliary GPIO connections for greater design flexibility.
• UF2 Bootloader Convenient drag-and-drop firmware updates over USB.
• ZMK and Zephyr Designed for modern, configurable, open-source firmware applications.

Designed for Makers. Built with Purpose.

Chiisai reflects Clickety Split's approach to hardware design: practical functionality, thoughtful integration, and flexibility without unnecessary complexity.

Designed and assembled in Canada using globally sourced components, Chiisai brings together careful engineering and hands-on craftsmanship in a compact, capable controller.

Small by design. Capable by nature.