This open-source keyboard lets you snap keys together in any layout

The takeaway: Customized keyboard home builders can switch out switches, keycaps, plates, and firmware nowadays, however the design is typically secured as soon as the PCB is made. Now, a brand-new open-source job called Keybytes is attempting to navigate that constraint by offering each secret its own small circuit board and microcontroller. The secrets snap together with magnets and link to a little center, permitting a keyboard to begin as a single secret and turn into practically any shape.

The task originates from Nathan Alspaugh, an MIT freshman studying aerospace engineering, who stated he has actually invested around 100 hours dealing with it considering that March. When he published the task to Hacker News today, he stated the concept originated from his aggravation that no one offered triangle- or circle-shaped keyboards.

Each secret, called a Keybit, includes a 19.05mm-square circuit board fitted with a Cherry MX switch and an economical CH32V003 RISC-V chip. The surrounding module, whether another essential or the center, gets power and I2C information through spring-loaded pogo pins along all 4 edges.

The center, called the Keyword, inhabits the exact same 1u footprint however stacks 2 PCBs. An STM32WB55 on the upper board manages Bluetooth and shops firmware for each secret. The lower board homes the charging circuitry for an optional LiPo battery and the USB-C port.

Instead of sharing a single bus, each Keybit bit-bangs a different I2C connection along each of its 4 sides. Alspaugh described in the Hacker News thread that this method lowers parasitic capacitance and enables the software application to figure out the physical position of each secret. In theory, that indicates a chain of secrets might extend forever.

Getting the magnets best took substantially more experimentation. According to his develop journalthe very first magnetic cases could not hold the modules together versus the force put in by the pogo pins. Instead of revamping the boards to accommodate weaker pins, Alspaugh went with more powerful magnets and printed case after case in resin at a makerspace. The center’s case alone went through 12 models. His very first working develop lastly came together on October 24.

Nevertheless, the existing demonstration functions simply 2 secrets connected to the center, as Alspaugh is still developing extra modules and completing the firmware. Design choices are likewise restricted to a flat grid in the meantime.

Scaling up would get costly rapidly, too. Alspaugh approximates that a totally put together, full-size keyboard with 2 centers and approximately 110 secrets would cost around $900. Nearly half that quantity would approach the pogo pins, so he prepares to purchase and solder them himself if he ever constructs one.

Anybody who wishes to attempt the task can discover the schematics, case STEP files, and expense of products on its GitHub pagewhich is released under an MIT license. The PCB style files are offered there, too– something Keychron kept back when it opened its case and plate styles previously this year.