YASK Steno Keyboard

This is a USB steno keyboard PCB for use with Plover. http://www.openstenoproject.org/plover/
It's a relatively easy to assemble if you have basic soldering skills and a hot glue gun.
I like it better than the other DIY or "low-cost" options I found, because:
The two hands are spaced apart somewhat, but it's still a mono-bloc design (it can rest on your lap). The "number" and "*" keys are duplicated, for comfort.
It uses 2U keys (a single, long key for two positions), to avoid unnecessary gaps. They still hold well and remain smooth despite the overhang.
It connects over Gemini PR protocole. No interference with your existing keyboard, even if you have Dvorak re-mapping and funny input methods.
It's cheap, if you can build it yourself (especially if, like me, you're going to need 2 or 3 for your home and office)
 
What I don't like about it (look out for a Version 2!):
It's not wireless. Silly me! Where did I have my head!
It doesn't have any fancy features like recording your strokes into a memory bank when you're off-line, and then re-playing them when connected.
 
Here are the assembly instructions: https://youtu.be/82yD0RMeEw8
 
You'll need:
28 mechanical key switches. I've used Gateron KS-9 RGB switches, but most brands should fit. White stem (35g), the force is just right, even when pressing multiple keys together.
the same number of key caps. I suggest XDA keys (but any should fit), they feel good when pressing 2 keys with the same finger. I bought mine here: https://item.taobao.com/item.htm?sid=654489112097 They're good and they have 2U keys, but you might need help from a Chinese friend.
a RP2040 microcontroller board. They're the star of the year (2022), so you won't have trouble finding one.
Some 2.54mm header pins
a USB cable.
 
Software: you'll need
the Micropython image for the RP2040
Thonny
main.py and YASK.py from https://github.com/ttempe/YASK