2025-02-19 (W) EWC_Soother Half of the encoders are operational

I could not communicate with the microcontroller until I desoldered the pull-up resistor on pin 12. I checked, and it was not a reset pin. I had a similar problem when I uploaded an input testing program, and it refused to loop until I removed code that pulled some analog inputs up. Once the program ran, I saw issues with the encoders. I discovered that not every pin can use a programmable pull-up resistor. I moved three contacts to acceptable pins, and my encoder started working. I modified the program to track the encoder and output the running count to Arduino's plotter. The device worked nearly perfectly except for a few blips, which I circled in orange.

Acceptable errors on the working encoder

While reading about the internal pull-up resistors, I read that some of the used pins may be a serial port, so I switched back to match the schematic and soldered 10KΩ resistors to the encoder inputs. I chose to add them on the encoder's body instead of the microcontroller so I could still remove it quickly if necessary. Testing showed that floating inputs were not the only problem because I kept getting terrible bouncing on the second encoder. I will replace that unit, which means moving the resistors over as well.

10KΩ pull-up resistors

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
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11

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2025-02-12