The Button Board For My Remote Arrived
The package I had been waiting for is here: the circuit board that carries the buttons for the universal remote I am building for my smart home.
A circuit board is simply the thin plate that holds the electronics and the wiring between them. This one exists purely so the buttons sit in the right spots and connect cleanly to the rest.
Holding a part you drew on a screen a few weeks earlier is the point where a project stops being an idea.