2023-06-10 (Sa) KeyBoardolier Schematic

I only have one significant hardware revision left, which is to add four function buttons to the keyboard's handle. I drafted my schematic, which should stay the same, and included the four keys. I considered drawing this by hand, but the seventy-five-key array made CAD the best use of time.

I arranged the keys as they are on the physical model, and I bunched the parallel wires bridging the two halves. Instead of tracing each wire to a spot on the IO expander, I used reference tags. I continued this trend for the function buttons, which get dedicated inputs instead of positions on the diode matrix.
Schematic (click to enlarge)

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8

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