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2 layers274.8 × 109.7 mmPcb adjusted, the printed circuit board in 3D

My first custom ergo unibody keyboard.

Size
274.8 × 109.7 mm
Copper layers
2
Thickness
1.6 mm
Parts
81
Nets
62
Pads
544
Tracks, vias
601, 2
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
2 Mar 2025
Updated
27 Apr 2025

Overview

Pcb adjusted is an open-source printed circuit board by Mvrlex, from the Mvrlex/yet-another-ergo repository on GitHub, published under the MIT licence. It is a 2-layer board of 274.8 × 109.7 mm with 81 parts on 62 nets, routed with 601 tracks and 2 vias.

Its parts include 40 diodes and 40 switches. It belongs with the keyboards and input boards of this library.

README

README.md

yet-another-ergo

The climax of my split custom keyboard journey. My own custom ergo unibody keyboard. Inspired by the Cantor and Kaly.

picture

Thanks to FlatFootFox. Without your blog series this would not have been possible.

The why

I created this because I wasn't really satisfied with the available offerings, the closest thing to what I wanted was a Cantor, which I have built, but I wanted to try an even more aggressive stagger, which spurred the creation of yet-another-ergo keyboard.

The creation

Working on this was really fun. From designing the board, to creating the PCB and assembling it. Funnily enough the programming part, which I should have been most familiar with, was the most frustrating part. I found a lot of conflicting information online about how to set QMK up and how to use it. It seemed like there is a dozen ways to do the same thing, and using one breaks the other. The minimalist examples didn't really help either. I think I get how QMK works now, but in the end I gave up on creating my keymap in code, and simply used Vial (because Via can't do Tap-Dances?) to set it up. That's why the keymap.json is so barren :D

The journey

I like mechanical keyboards, and I like modding and customizing them. After finding my favorite TKL-ish keyboard, the Akko 5075, I started noticing that I made a lot of mistakes when typing. So I set out to learn touch typing. Which was fine, but I soon learned that my hands were not really the problem, but the keyboard layout. The german QWERTZ layout absolutely sucks for programming, pretty much all the symbols are hard to reach and require a modifier key.

I then found Ben Vallacks YouTube channel, and fell down the rabbit hole of split keyboards. They looked sick, and promised all these benefits, but they also were incredibly expensive So I went all in and built myself a Cheapino.
I loved it. Ortholinear keys for sensible finger movements, split design for better ergonomics, and a thumb cluster to use the thumbs a bit more. However, after trying to use it for programming I realized that I'm missing a few keys, and the numbers were hard to type.
So next up was the Silakka54. This is where I stayed a bit and learned what I liked and what I didn't like. I definitely wanted a more aggressive stagger, a more compact layout for less finger travel, and a thumb cluster that did not break my wrists when using it (seriously, wtf). I also would like for the keyboard to look nice.

This is when I started looking for the perfect keyboard for me, and honestly, the closest thing I found was Kaly a derivative of the Cantor, but I didn't really like the design, I didn't want another split, and I wanted a smaller thumb cluster. So at that point why not just design my own?

Did I succeed?

No.

After starting the journey of creating my own keyboard I realized that I would not be able to achieve my initial goal of making less mistakes with such a keyboard. Maybe after years of use and a lot of fine-tuning.

What I don't like
  • layer switching is a pain when typing fast
  • typing numbers is hard, even with practice
  • home-row mods (or for me bottom-row mods) are too inconsistent
  • long typing sessions are actually uncomfortable, because of the forced use of my pinky and ring finger
  • I can't type some keys when my hand is on the mouse, which breaks my flow
What I like
  • it's fun
  • it looks cool
  • ortholinear keys just make sense
  • higher typing speed, with greater potential for improvement
  • tap-dances for keys like ä, ö, ü, and ß are great
  • the position of backspace, enter and escape on the outermost keys is great
  • osm shift as a thumb key is great
  • minimalist design and more space on the desk

What's next?

I think I will stick with what I have for now. I will try to get used to it. If I can't, I will either go back to my lovely TKL or I will build another custom keyboard similar to the X-Bows Ergo, which I think is a pretty good compromise.

Thank you

Thank you for reading this far. If you liked my little ramble, please consider starring the project. I do need me some of that internet clout ;)

Parts

81
QtyValueFootprintReferences
40ComboDiodeD1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +24
40MXS1, S2, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23 +24
1ProMicroMCU1

Questions

How big is the Pcb adjusted PCB?

It measures 274.8 × 109.7 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Pcb adjusted use?

81 parts. 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 Pcb adjusted KiCad files?

From the Mvrlex/yet-another-ergo repository on GitHub, at the commit this page was made from: the board is pcb/pcb-adjusted.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Pcb adjusted design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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