Now I have most of the components and am now working on assembly. Yesterday I managed to solder the SMD diodes in. They presented no serious difficulty.

I could get some idea of how things fit together at this point and found that things are far from straightforward. In particular it looks like my stabilisers are of the wrong type. They fit badly in my plate and tend to jam after lots of presses.

I had to order different stabilisers that would screw into the PCB.
Now I’m trying to attach mill max hot swap sockets so I can replace the switches without needing to desolder. They fit very tightly in the holes: it needs a fair bit of force to push them in and it’s easy to break them if you’re not careful.

I’ll probably need to solder them in too just to be safe. Once that’s done I can start writing the firmware for this. I use a 26-pin IDC cable to connect the keyboard PCB to the microcontroller on a separate board. I know this is a 40-pin one but I forgot to change it and in any case I need the extensibility for the future.
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