Developer Severin Meyer has designed an impressively slick open-hardware ergonomic ortholinear mechanical keyboard, based mostly round a 3D-printed chassis and a versatile sectioned PCB — and powered by a Raspberry Pi Pico microcontroller board.
“Chrumm is an open-hardware ergonomic keyboard, manufactured from a 3D-printable physique, a bendable PCB, and customized firmware for the Raspberry Pi Pico,” Meyer explains of the machine. “Chrumm encompasses a column staggered format with easy thumb clusters. The fitting facet has an extra column, to raised approximate the usual ANSI format, and to supply devoted arrow keys. A central encoder permits for rotational enter.”
This Raspberry Pi Pico-powered keyboard’s smooth design belies its 3D-printed nature. (?: Severin Meyer)
That is already a powerful listing of options, however Meyer’s mission has extra behind it. The 3D-printed shell assembles right into a single block with no seen screws, 3D printed utilizing STL information generated from a Python package deal. “Most components are printed sideways,” Meyer explains, “to provide a easy floor with out the necessity of post-processing. Customized helps reduce the print time and filament price.”
Contained in the housing are a pair of PCBs designed to host the keyboard’s switches, cut up into sections linked by versatile bridges to be able to permit the PCBs to evolve to the curved form of the case. A small companion PCB homes the rotary encoder, used to rapidly modify quantity, whereas one of many two principal PCBs performs host to a Raspberry Pi Pico because the keyboard’s controller.
The wrist-rest is upholstered for consolation, whereas the principle keyboard physique is assembled right into a single piece with no screws seen from the highest. (?: Severin Meyer)
Even then, that is not the total extent of the mission: to complete the keyboard, Meyer designed an identical wrist-rest which extends out at both facet of the keyboard’s angled entrance — then completed it in artificial leather-based to supply a softer, extra cushioned really feel.
Meyer has launched the supply code and design information for the Chrumm on GitHub beneath the CERN Open {Hardware} License Model 2 — Weakly Reciprocal; “I share these information within the hope that they’re helpful,” the maker writes, “or a minimum of fascinating to others.”