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https://github.com/Didgy74/didgy-kb

Contains source files for any keyboard I design.
https://github.com/Didgy74/didgy-kb

ergogen

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Contains source files for any keyboard I design.

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README 

        
# didgy-kb

A catch-all repo for any keyboards I design.



These designs are all designed with [Ergogen](https://github.com/ergogen/ergogen).



# Mitten



This design has the following properties:

 - 30 keys

 - Split

 - Columnar stagger

 - Column splay on the outer columns

 - Wireless

 - Reversible PCB

 - (Very) Low profile (Choc Mini)

 - Choc spacing in Y direction

 - MX spacing in X direction

 - 1u keys for fingers

 - 1.5u keys for thumbs

 - Includes mountplate

 - Standard ProMicro support (Note that it's wireless only, so use a compatible MCU with Bluetooth connectivity)



In short, this design is heavily inspired by the [Ferris](https://github.com/pierrechevalier83/ferris) (or more specifically, the [Sweep](https://github.com/davidphilipbarr/Sweep)). This keyboard is very similar with a few key design differences:

 - Stagger adjusted for hands that have a short index finger

 - Outer columns are splayed

 - Removed one key from innermost column and outermost column.

 - Choc Mini support

 - Larger thumbkeys (1.5u)

 - Designed for wireless operation **only**

 - Includes mountplate

 

 

### Information



**Main PCB thickness:** 1.6mm



**Mount plate thickness:** 1.6mm



Mount plate is mostly for making the design sturdier and holding keys in place a bit better.



**Connector:** Molex PicoBlade 2-pin horizontal (Often mislabeled as Micro JST in stores)



**Key switches:** Kailh Choc Mini PG1232 (https://www.aliexpress.com/item/4000277394324.html)



Personal note: Try using 35g springs with linear (black) motion.



**MCU sockets:** Mill-Max Interconnect Machined Pin Socket. Pitch 2.54mm. Height above PCB: 7mm.

Part no. 801-XX-XXX-10-001000. You need at least 12 pins wide, any more can be broken off.



**Underside material:** Neoprene (need actual testing still)



**Keycaps:** MBK profile Choc (https://splitkb.com/collections/switches-and-keycaps/products/blank-mbk-choc-low-profile-keycaps)



**Power switch:** 7-pin micro SPDT



**MCU:** nice!nano



Xiao Seeed was considered for its smaller size, but since battery is mounted under the MCU, the battery would have to become too small anyways.



**MCU socket pins:** Mill-Max gold pins. Part no. 3320-0-00-15-00-00-03-0. (https://splitkb.com/collections/keyboard-parts/products/mill-max-low-profile-sockets?variant=32170972020813)



These could be thicker / longer, fit is not very good.



### Instructions



The MCU has to be mounted **face down** by default.



By default, all jumpers need to be shorted on the **opposite side** of where components are mounted.



### Future design work

I intend to keep iterating on this design over time, here are a few ideas I would like to eventually realize:

 - Add wired connectivity (but only if I, or a number of users request it)

 - Remove a key from the pinky column

 - **Possiby** try out a very low profile rotary encoder

 - Tighter vertical keyspacing (would require custom keycap work)

 - Choc Mini support

 - Add instructions for automatically routing the PCB



Other than that, I'll probably make adjustments to the stagger and key placement over time.



### Configuration 



While this is currently configured to fit my hands specifically, I am very much interested in creating a very parametric design. I try to keep the .yaml file commented enough to easily understand how to modify it. For instance, you could easily switch to using MX spacing by modifying the lines

```yaml

  keyspacingx: cx

  keyspacingy: cy

```

to

```yaml

  keyspacingx: u

  keyspacingy: u

```

and even switch to MX switch footprints by finding the YAML variable named `key_footprints`. Other configurable values currently include margin around key switches, rotation of the home thumbkey. I plan to add more of configuration in the future.