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2 layers158.2 × 115.1 mmWysteria, the printed circuit board in 3D

custom split keyboard

Size
158.2 × 115.1 mm
Copper layers
2
Thickness
1.6 mm
Parts
84
Nets
60
Pads
783
Tracks, vias
1,051, 6
Pours
293
Routed
Yes
KiCad
KiCad 7 (file 20221018)
Created
6 Apr 2023
Updated
19 Apr 2024

Overview

Wysteria is an open-source printed circuit board by j-w-e, from the j-w-e/wysteria repository on GitHub. It is a 2-layer board of 158.2 × 115.1 mm with 84 parts on 60 nets, routed with 1,051 tracks and 6 vias.

It is built around the SK6812MINI-E. Its parts include 21 diodes, 18 switches and 18 inductors. It belongs with the keyboards and input boards of this library.

Main components

1

README

readme.md

JWE's custom split keyboard, the Wysteria

This is my custom split 36-key keyboard, with an encoder knob on each hand, and a pinky cluster to avoid stretching my pinky – I find lateral movement easier.

The pcbs, and the source ergogen file used to generate v0.3, can be found in the pcbs folder.

It has working firmware for both QMK and ZMK. Source files are in the repo, but I have not put this into the main repos for either QMK or ZMK. My own build process symlinks these as appropriate.

NOTES

v0.3 has been printed and tested, and is my current daily driver. However, please note that to build it, the diodes on the thumb cluster need to be handwired to the rows. The traces on the PCB itself are incorrect. This has been fixed in the ergogen config file, ready for if and when I print it again, but this has not had all the traces set up in KiCad, and has not been printed or tested.

  • Will (should) work with both QMK (with an oled and trrs) and ZMK (with nice!nano and nice!view)
  • If using a display, make sure to solder the jumpers on the opposite side of the board to where the dislay is mounted. This is different to the MCU jumpers, which should be soldered on the same side as the MCU (if mounting face-up)
  • The ergogen config places an extra diode below the middle finger, bottom row. I manually replace this in KiCad with the Wysteria graphic. (I haven't worked out how to make the graphic into an ergogen-compatible footprint. I'm happy with the manual step for now.)

Parts used

Tenting set-up

To do

If I ever decide to build a new one, want to:

  • Fix the problem of the thumb cluster not being in the matrix
  • Move the thumb keys slightly further down (ie closer to the wrist). My thumbs naturally rest so that only the very tip is on the key.
  • Rotate the lateral pinky key by 90 degrees, so that the keycap can be rotated as well.
  • Move the lateral pinky key down 2mm.
  • Move the reset switch to a more sensible location, though where that is I don't currently know.
  • If I am feeling very ambitious, think about making a steel plate as a base, so it attaches cleanly to the magsafe tripod adapter. But I would need to work out how to properly countersink the screws, and rethink where the screws are.

References

Made based on

Guides for other parts

Keyboards used as reference

Other references:

Parts

84
QtyValueFootprintReferences
19ComboDiodeD1, D2, D3, D4, D5, D6, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19 +3
18MXS1, S2, S3, S4, S5, S6, S7, S10, S11, S12, S13, S14, S15, S16, S17, S18 +2
18SK6812Mini-eWS2812BL9, L9, L9, L9, L9, L9, L9, L9, L9, L9, L9, L9, L9, L9, L9, L9 +2
2E73:SW_TACT_ALPS_SKQGABE010B1, B2
2E73:SPDT_C128955T1, T2
2output v0.2 as printed:WysteriaD20, D20
1lib:batJST1
1ProMicro_1
1combo_displaySCREEN1
1rotary_encoderROT1
1TRRS-PJ-320A-dualTRRS-PJ-320A-dualTRRS1

The 66 most common of 84 parts.

Questions

How big is the Wysteria PCB?

It measures 158.2 × 115.1 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Wysteria use?

84 parts, built around the SK6812MINI-E. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Wysteria KiCad files?

From the j-w-e/wysteria repository on GitHub, at the commit this page was made from: the board is pcbs v0.3/pcbs/wysteria.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Wysteria design in my own project?

Its repository states no licence, so its author keeps all rights: ask j-w-e before reusing the design.

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