ErgoDash

           

ErgoDash Release status: beta [box doku]
Description	Building our own nice looking keyboard in two more or less ergonomic pieces
Author(s)	Uli (Tamás & Uli)
Last Version	0.9.0 (17.10.2019)
Platform	QMK
License	ErgoDash is under MIT License
Download	https://github.com/omkbd/ErgoDash

Introduction

This keyboard is the result of frustration of not getting the keyboard we want because it was either too expensive or not available or both. So we decided on building our own. Since we couldn't find an open source layout for the very much desired orhtolinear "Preonic" from OLKB https://olkb.com/preonic, we found the Ergo Dash to start with since the PCB designs are available under MIT license. Probably inspired by the ErgoDoxEz, the ErgoDash is an open source project and can be found here https://github.com/omkbd/ErgoDash.

Other custom keyboard layouts and manufacturers can be found here:

 - Ergodox EZ https://ergodox-ez.com/
 - Planck EZ https://ergodox-ez.com/pages/planck
 - OLKB https://olkb.com/

Parts

Order list: https://docs.google.com/spreadsheets/d/1jseLgmKsGSOt070vr_fO8ZmJpHGX4H3fttUJ9bLBZD8/ (complete shopping list or BOM will be added soon)

Case

The case has to be manufactured (e.g. lasered out of acrylic glass) and consists of 3 parts:

- top layer (between actual switches and PCB
- bottom layer (lower side of PCB)
- microcontroller panel (covers the arduino and TRRS connector)

Assembly

1. Order PCB, electronics parts, cables, case material (e.g. acrylic glass) and screws
2. Solder electronics onto bottom side of PCB
3. Build Case (e.g. laser acrylic glas which looks nice)
4. Attach and solder keys and backlight LEDs to top side of the PCB between top case and PCB
5. Assemble full case by using small screws and spacers
6. Upload firmware & connect keyboards
7. Finish and fine-tunig (e.g. silicone rubber feet on bottom) or artisan keycaps

The electronics parts (mostly resistors and diodes) are being soldered onto the bottom side of the ErgoDash PCB

The top part of the acrylic glass case if put on top of the PCB where the actual key switches and backlight LEDs are being soldered.

The completely assembled switches and LEDs on the top side of the PCB with some keycaps already attached.

Some design choices should best be made before ordering or manufacturing the case

- backlight LED color (Tamás chose white and Uli chose blue for example) - choice of LEDs might have an impact on the resistors too => please check
- single (1U) or double (2U) thumb switches
- position of lower middle switch (inline or offset with the row above) 

Also a pretty good description can be found here: https://github.com/omkbd/ErgoDash/blob/master/Doc/build-en.md

Debugging

Soldering resistors and diodes

Please check that you have soldered all components onto the PCBs. Make sure to count them and to be on the safe side, let someone else have an unbiased look at it.

Keys and backlight LEDs

During assembly of keys and backlight LEDs, it should be checked quite often (e.g. after each row or so) that the keys have contact (multimeter in beep mode) and the LEDs glow (check right polarity first and then attach the board connectors on top with a PSU - use very carefully in C.C mode). It is very painful when you make mistakes here, because it could mean that you have to disassemble many parts again to reach the defective areas

Bottom WS2812 LEDs

If not all bottom WS2812 glow, use a multimeter to check if all voltage and ground pins are soldered properly and if the signalling between the LEDs is connected.

Firmware

We used the 333fred firmware layout of the ergodash.

firmware can be found here: https://github.com/qmk/qmk_firmware/tree/master/keyboards/ergodash

Open Issues

Uli still has some open issues with the backlight of his left hand part of the keyboard, which tends to get darker and darker - after about a minute or two it is completely dark. Maybe it is the result of some leakage current by soldering not properly. After reconnecting the keyboard, the backlight glows at full intensity again, but becomes darker over time as described before.