Doro56

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A 56-key split keyboard with a reversible PCB that uses normal mods, an exploded number row, a semi-columnar staggered layout, plus support for rotary encoders. Mainly inspired by Alice layouts and split boards like the Lily58 and Corne.

ZMK config

• support for https://nickcoutsos.github.io/keymap-editor/ and https://zmk.studio/

QMK config - None yet - RP2040 Pro Micro support soon

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Changelog

v1.2 - Minor Edit

• JST PH Footprint: The footprint has been updated to avoid the need for manually changing plug polarity. Ensure the Red (+) wire matches the plug's positive pin as the 2 outer pins are negative/ground pins. If your plug isn't matching the indicators, just shift the socket one pin sideways. Note: This socket is installed on the bottom of the half you're building.

v1.1 - Minor Edit

• Caps and Enter Footprints: Changed to a single reversible footprint (previously used two single key footprints rotated).
• JST PH Footprint: Adjusted and relocated for increased flexibility.
• Plate: Slightly increased the cutout size for the rotary encoder.
• PCB Cutout: Modified to remove blank space between Control and Alt keys, allowing space for a 402030 battery without increasing the case height clearance.

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Build Guide

Quick overview:

• Solder the MCU with the components facing down, and the TRRS jack on top of the half you are building. For MCU socketing, the footprint was modified to allow sockets with thick pins to work. You can use milmax pins, or, what I use, harvested gold pins from a 5-pin RGB header (also cheaper). Sample 2
• Bridge the jumpers on the MCU from underneath, and add other components such as diodes, MX sockets, and the power switch.

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PARTS

COMPONENTS	Qty	Remarks
Diodes 1N4148W (SMD)	58	SOD-123
MX Switch Sockets	56
2U PCB-Mount Stabilizers	04
Power Switch	02	MSK12C02
Reset Switch	02	MJTP1250
JST 2 PH Right Angle Jack	02
TRRS Jack	02	MJ-4PP-9 or PJ320A
Rotary Encoder	02	EC11 - acrylic case has enough clearance for 22mm knobs

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MCU	Qty	Remarks
Low Profile MCU sockets	04	The MCU socket footprint was modified to allow sockets with thick pins to work. This will make the build cheaper compared to buying Millmax sockets.
Mill Max Pins	48	Mouser 3320-0-00-15-00-00-03-0, or a cheaper option: harvested gold pins from a 5-pin RGB header (just snip off the plastic parts)
Nice Nanos	02	or NRF52840 clones
Li-Po Battery	02	Take note of the polarity before plugging the battery in. Here's a tutorial on how to change the polarity.

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CASE	Qty	Remarks
Acrylic Case	01	Maybe a 3DP one soon, but I'm very content with the acrylic case. Let me know if you create one!
M2 6mm Wafer Head Screws	20	Plate screws
M2 10mm Round Standoff Spacer	10	Plate standoffs, add +2mm if you need bottom clearance (see case readme)
M2 8mm Wafer Head Screws	32	Case screws
M2 13mm Round Standoff Spacer	16	Case standoffs, add +2mm if you need bottom clearance (see case readme) ; can also be -1mm if it's protruding the middle layer
Rubber Feet	08	Currently, the keyboard lays flat. I’ve yet to design a base layer for angled feet

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FOOTPRINTS USED

• https://github.com/ebastler/marbastlib
• https://github.com/joe-scotto/scottokeebs
• https://github.com/GEIGEIGEIST/KLOR
• https://github.com/50an6xy06r6n/keyboard_reversible.pretty

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DISCLAIMER

Please note that while this keyboard is provided as open-source, I am not liable for any issues, malfunctions, or other problems that may arise from its use. The keyboard is provided "as-is," and I make no warranties or guarantees regarding its performance or functionality. Use at your own risk.