Apos has launched the Preonic Rev 4, marking a significant evolution of Jack Humbert’s ortholinear keyboard. Humbert, founder of OLKB and creator of the Planck keyboard, pioneered the custom mechanical-keyboard movement by advocating for programmable, compact layouts. The Preonic Rev 4 retains the core philosophy while integrating modern tech like an RP2040 microcontroller and a four-layer hotswap PCB. This update enhances customization with support for up to ten rotary encoders, full RGB lighting, and universal USB daughterboards. The design emphasizes programmability, aligning with Humbert’s vision of keyboards as adaptable tools rather than fixed devices. The Rev 4 also features improved ESD protection and SWD breakout pads for developers. Available in aluminium cases with three color options, it supports multiple layouts. The keyboard reflects Humbert’s belief that devices should evolve with user needs.

Humbert’s work on the Planck and QMK firmware laid the groundwork for the modern custom keyboard ecosystem. His focus on ortholinear grids and layer-based customization challenged traditional typewriter layouts. The Preonic Rev 4 builds on this by adding advanced features like double-detent encoder compatibility and enhanced customization options. Its modular design allows users to tailor inputs for media control, macros, and layer switching. The keyboard’s philosophy remains central: it is repairable, reprogrammable, and designed for personalization. This aligns with trends in the community favoring flexible, user-driven hardware.

Technical upgrades include SWD debugging support and universal USB daughterboard compatibility. The PCB now accommodates diverse configurations, from 2x 2u to full-grid setups. RGB backlighting and underglow are standard, with extra ports for external accessories. These changes make the Rev 4 a versatile platform for enthusiasts. The integration of rotary encoders expands functionality beyond basic key presses. Users can assign complex commands directly to the keyboard. This level of customization reflects the movement’s shift toward functionality over traditional key arrangements.

The Preonic Rev 4 continues Humbert’s legacy in the custom keyboard space. By blending innovation with his original ortholinear concept, Apos has created a device that honors past contributions while embracing new technologies. The keyboard’s adaptability ensures it remains relevant as hardware and user preferences evolve. For those prioritizing programmability and compact design, the Rev 4 offers a balanced solution. It exemplifies how modern keyboards can merge tradition with cutting-edge features.