SplitKBD
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Open-source split mechanical keyboards

Russian ErgoMech Community: https://t.me/klavaorgwork
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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
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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
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
nRFMicro 1.4 by Joric

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

#mcu
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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
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
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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
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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
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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
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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
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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
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
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
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
Alvaro v1.5 by Ariamelon

Pro Micro-compatible 32u4 Breakout Board. This board is a heavily-modified Goldfish Rev. C. While the schematic, basic layout, pinout (of course) etc is essentially the same, it uses 0603 components instead of 0402 and has some other changes.

Features
* Mid-mount USB-C connector using a low-profile USB C 2.0 connector.
* Pin-compatible with the original Pro Micro.
* 5 extra pins on the bottom like the Elite-C and Goldfish.
* Exposed USB data lines on 2.54mm grid.
* Easier to solder than the Goldfish.
* Has fuse unlike Goldfish.
* On-board power LED.
* Fully hand-solderable.

#mcu
Wizza by AlaaSaadAbdo

30 keys board with a couple of extra features

Features
* 30 keys
* Dual Trackball
* Per Key RGB
* Underglow
* Tenting puck support
* Haptic feedback
* Dedicated mouse buttons (kailh silent mouse buttons)
* 5 way switch
* TFT/LCD screen on both sides
* MCU RP2040 with elite-c footprint (5 extra pins at the bottom)

Gallery

#choc • #mx • #promicro • #rp2040 • #qmk • #display • #haptic • #rgb • #trackball • #30key
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Scylla by Bastardkb

A modern low-profile ergonomic split keyboard, with a number row and a feature-full thumb cluster.

Features
* Split compact ergonomic keyboard
* Keywell and column-staggered
* Same layout as a dactyl manuform Mini
* Per-key RGB (optional)
* Low profile
* Comes with QMK and online configurator
* Tenting base, 30 degrees (optional)
* Anti-slip pads

#mx • #promicro • #qmk • #rgb • #3d • #58key
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Cheapino by tompi

Probably one of the cheapest split keyboards you can build.
This is the result of really enjoying building keyboards, but not wanting to spend that much money on it. The pcb is reversible, connected using rj45, and utilizes a japanese duplex matrix, so only one mcu is needed (in fact it only uses 7 of the rj45 wires to support 18 switches and an encoder on the right side).

Build guide

#mx • #rp2040 • #qmk • #encoder • #36key
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VFK-001 by v0Ch

Valkyrie folded keyboard (folded vertical dactyl on full size mx silent switches) with removable stabilizer

#mx • #promicro • #qmk • #handwired • #trackball • #3d • #36key
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Lofree & Kalih Announces Shadow: World's First Series of Full POM Material Low-Profile Switches

#news