SplitKBD

0xB2 - splinky by plut0nium

Pro-Micro/Elite-C replacement with USB-C and RP2040.
Designed for use in custom mechanical (split) keyboards, but many other uses are possible.

Features
* Pro-micro / Sparkfun RP2040 compatible footprint, with 5 extra pins at bottom (Elite-C style)
* Raspberry Pi RP2040 MCU
* Up to 16MB flash memory (depending on component selection and availability)
* User LED & USB VBUS detect
* Low profile USB-C mid-mount connector
* Designed to be manufactured and assembled by all common PCBA services (including JLCPCB)

#mcu

NINE by bsag (but she's a girl)

The Nine is a tiny 18-key split, wireless, ergonomic split keyboard, heavily inspired by Ben Vallack's Piano 2. I tried out his design and loved it, but wanted to tweak the physical layout a bit to fit my hands and my use case better. It uses Nice!Nano V2 BLE-equipped controllers, and (optionally) Nice!View displays to show information like the connected BLE profile, battery level and layer name. You can read more about this keyboard and the design decisions I made here: Introducing the Nine keyboard and Nine keyboard Part 2 - the case.

#choc • #nrfmicro • #ble • #zmk • #display • #niceview • #diodeless • #18key

0xCB-Helios by 0xCB-dev

The 0xCB Helios is an Elite-C compatible MicroController that is based on the RP2040

Helios has 16MB(128Mbit) of flash, Dual ARM Cortex-M0 @ 133MHz, and 264kB SRAM. It features a default off red power LED, a blue user LED, and a level-shifter to drive 5V components. Helios has an ESD protection chip onboard, supports VBUS detection for split keyboards, and you can select VBUS instead of raw for the 5V pin to hook up an external USB port with the included D+ and D- pads while maintaining ESD protection. Another huge advantage is the single button reset circuit which enables you to reset the board with a short click and enter the bootloader with a long (>500ms) click. This backwards compatiblility also enables you to use reset buttons on existing keyboards for both functions. The bootloader is unbrickable as its located in ROM on the rp2040 itself.

#mcu

3w6 by weteor

a small compact 3x5+3 split ortho keyboard. It's designed to be a no frills, cheap and small keyboard to be taken everywhere.

Features
* Onboard controllers
* Combi footprint to be able to use the AU or MU variant of the AtMega32U4
* No hotswap
* No LEDs
* No multiple switchtypes
* No encoders

#choc • #qmk • #trackball • #36key

MRIYA by Max Yakovlev

MRIYA (Ukrainian for «Dream») is a 42-key column-staggered split keyboard based on Corne Cherry v.3.0.1

Features
* Simple and clean design (fully optimized for wireless)
* Updated thumb cluster (inspired by jian)
* Reset buttons
* Native nice!view support
* Updated pinky stagger
* No LEDs
* Hot-swap MX
* QMK/ZMK support

#mx • #promicro • #nrfmicro • #qmk • #zmk • #ble • #display • #niceview • #42key

Sea-Picro by joshajohnson

Sea-Picro is a RP2040 based board in the Arduino Pro Micro form factor.

Features
* Compatiable with most pro micro based keyboards
* RP2040 microcontroller, with dual M0+ processors at up to 133MHz
* Mid mount USB-C connector, which is low profile and can't be ripped off
* Optional Elite-C style pinout, adding an additional 5 IO for large keyboards
* Single button reset / bootloader circuit which changes behavior based on how long it's held (RP2040 usually requires two buttons to flash new firmware, making it challenging when installed upside down in a keyboard)
* ROM bootloader which prevents board from being bricked
* EXT version has a 5V level shifter and extra pin to drive strings of WS2812 LEDs.
* RST version has a WS2812 LED for use with CircuitPython or as a status indicator on the RST version.
* Onboard power LED.
* IO pinout identical to the Sparkfun RP2040 Pro Micro

#mcu

Sea-Micro by joshajohnson

Arduino Pro Micro, with a USB Type-C Connector. Targeted as an alternative for the ubiquitous Pro Micro in DIY keyboard applications.

Features
- Pro Micro compatible pinout
- Mid Mount USB Type-C Connector
- On-board reset button

#mcu

Chocofi by pashutk

Chocofi by Pavel Glushkov is a low profile 36-key hotswappable split keyboard inspired by Fifi keyboard.

Features
* Split keyboard with 3 rows, 5 columns, and 3 thumbs per half
* Increased pinky column stagger
* Inspired by Fifi keyboard
* Double-sided pcb (pcb can be used as left or right half)
* Pro Micro compatible footprint
* Easy to print, FDM-friendly two-piece case

Photo source

#choc • #promicro • #nrfmicro • #qmk • #zmk • #ble • #display • #oled • #36key

Skeletyl | TBK-Mini by Bastardkb

Compact and silent Dactyl-like keyboard with per-key RGB for ergo lovers
photo source

#mx • #promicro • #nrfmicro • #qmk • #zmk • #ble • #3d • #rgb • #36key • #42key

elephant42 by illness072

The elephant42 is a split 42-key ergonomic mechanical keyboard

Features
* QMK support
* Staggered pinky keys for more ergonomics

#mx • #promicro • #nrfmicro • #qmk • #zmk • #ble • #display • #oled • #rgb • #42key • #oldschool

nRFMicro 1.4 by Joric

Pro Micro-compatible Bluetooth 5.2 board with Li-Po charger and USB-C (nRF52840-based)

#mcu

0xCB-Pluto by 0xCB-dev

Electrically and physically compatible with the standard Pro Micro featuring USB C, a flatter design for thight builds and preflashed with the QMK DFU bootloader for added stability. Also exposing all available pins!

#mcu

The Owl by sapristi

The Owl is a 36-key (diodeless!), MX-spaced, wireless keyboard.

It was forked from the rae-dux (itself inspired by the Architeuthis Dux).

The main difference with the rae-dux is that MX-spacing is used for the keys. This keyboard is also designed with top and bottom plates, so as to protect the MCU and the battery. The mounting holes will fit m3 screws / standoffs.

Note: the top-plate doesn't need the mounting holes, so you could remove them from the kicad files.

#mx • #nrfmicro • #ble • #zmk • #diodeless • #splay • #36key

Oddball by atulloh

The Oddball is a split mechanical keyboard with an integrated trackball. While drawing inspiration from things like the Jian and the Dactyl Manuform, it is instead designed with a switch plate and PCB to give it durability, replicability, and a more utilitarian look. It has a relatively minimal key layout, typically with 39 keys in total. The PCB is reversible so it can be built with 0, 1 or theoretically 2 trackballs. Due to the height and angle of the optical sensor, and as an ergonomic bonus, it requires a tented case.

Features
* Split design
* 39 keys
* Trackball
* Dynamic CPI (trackball cursor speed)
* 5° typing angle
* 8.5° tenting angle
* Angled thumb clusters
* QMK firmware

Gallery

#mx • #promicro • #qmk • #trackball • #3d • #39key

The Kunst by kunsteak

A wireless 18-key ergonomic keyboard (design idea inspired by Ben Vallack)

#choc • #nrfmicro • #zmk • #ble • #18key

Porcupine by anarion80

Porcupine is an autogenerated, ergonomic, split, 36-42 key, wired/wireless, columnar-staggered keyboard. It is designed to fit my needs and my hand, but it can be easily updated thanks to declarative design. It uses a ProMicro-compatible MCU board and supports both QMK and ZMK firmwares.

Features
* Autogenerated - PCB layout is declared using YAML config files and generated into PCB files using Ergogen tool (migrated to V4). Use my fork of it for added footprints.
* 3 variants (5x3+3; 5x3+4; 6x3+4)
* Wired or wireless
* Low-profile (using Kailh Choc switches)
* Reversible PCB (save cost in production)
* Pro-micro/Elite C/Proton C/nice!nano support
* Hot-Swap support
* SplitKB Tenting puck support.
* Uses KiKit to render PCB previews (see below)
* Uses KiBot to run DRC, create Gerber and Drill files for production (and Interactive BOM and 3d renders just for fun)

#choc • #promicro • #nrfmicro • #qmk • #zmk • #ble • #splay • #36key • #38key • #42key

Jiran BLE Lite by Ladniy

Wireless ergo-split keyboard, based on nRF52840 module.

Lite means using a less components as possible in order to make the keyboard cheaper.

Features
* Powered by ZMK Firmware
* Based on Holyiot-18010 module
* Hot swappable PCB
* Support 5 pins MX & Kailh Mid-Height switches
* Capacious 18650 batteries
* Hardware power switch
* USB Type-C

Photo source

#mx • #ble • #zmk • #18650bat • #56key

Pierce v2 by durken1

pierce 2.0 is a split modular wireless / semi-wireless 36 key column staggered keyboard. The design is inspired by Corne with more pinky stagger as well as only using 1u keycaps. It is possible to build a wireless version or a semi wireless version. If building the wireless version an additional reciever dongle is required. In the semi wireless version the wired half is also acting as a reciever for the wireless half. Both versions have full QMK support.

The semi wireless version has a built in reset circuit for connecting a PS/2 pointing device.

There are 3 different PCBs: wireless (reversible), wired (right) and reciever.

#alps • #mx • #choc • #qmk • #ble • #trackpoint • #dongle • #cr2032 • #36key

Clog v2 by smores56

The Clog V2 is a 34-key split keyboard with Pinky Clusters

Features
* Choc V1 switches
* Wireless only with Seeeduino Xiao BLE controllers
* Pinky clusters (top pinky keys on the sides)
* Splay (4° between middle and ring, 8° between ring and pinky)
* SplitKB puck support for tenting
* EVQWGD001 roller support

#choc • #xiao • #ble • #zmk • #splay • #encoder • #34key

Smudge by Sandalmoth

A curved keywell design intended to be handwired.

#mx • #rp2040 • #xiao • #handwired • #3d • #42key