2021-11-28 (Su) EWC_Panel OLED screen and potentiometer connected

I connected the OLED screen with slide-on test wires. The device came with header pins installed, so I left them alone otherwise, I would have soldered new conductors directly. I looked up instructions for my screens and found an Instructable for the beginning steps. I followed their advice about running an I2C address checker, and I'm relieved because my screen was not the default given in Adafruit's example code. I wrote the address on the back of the faceplate.

The example code ran once I input the correct address, but there were errors. The screen did not display a lot of pixels accurately. I checked that I input the right screen resolution, and that aligned. Since I used test wires, I grabbed another display and connected it, and it looked perfect.
Screen not working

I swapped out the questionable unit for another. With my printed faceplate adapters, this only required a couple of hex wrenches and pair of tweezers. When I looked at the screen under a magnifier, I saw cracks in the glass, and they went through some of the tiny conductors. I must have overtightened the bolts when I installed them the first time.
Cracks going through the conductors

Now that I could run the example code on a working screen, I turned to the potentiometer. I soldered wires to it when I connected the OLED screen. I wrote a function to report changes over the computer's serial port but stay silent otherwise. Next, I changed the code to display live values on the display. I was delighted that the screen refreshed quickly and without visible flickering.
Potentiometer valued displayed on screen

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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