2021-10-09 (Sa) EWC_Panel Footprint measurements

I have some unique hardware that I've never played with before. On the timer module, I'll use a four-character number display that communicates with I2C. It is surprisingly expensive, but I'm curious to try it. The four digits will correspond to the milliseconds between sync pulses.
Sketch and dimensions of seven-segment display

The OLED screen on my Back of the Hand keyboard came preinstalled, but it was probably the same unit I'll be using on the drum machine and instrument panels. Like the number display, this communicates with I2C. I should be able to find an Arduino library.
0.96" screen measurements

For the sixteen buttons on each instrument module, I will be using inexpensive 4x4 membrane keypads. They use eight IO pins, but that covers nearly all of my switches. Libraries probably exist, but I'll write a function to read the inputs.
Keypad and numbers

I thought of a way to make a labeled faceplate on the laser engraver. It will rely on the flexibility of plastic or wood, depending on what I cut. The pattern should work in the future if I use the keypads again.
Idea for a laser-cut keypad overlay

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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