Used Electronics:
1 x Pi Pico RP20240
1 x 1.3" OLED Display Module
2 x KY-040 Rotary Encoder
8 x Toggle Switches (MTS-123)
4 x 7 mm Mini Round Momentary Buttons
Here is my code:
https://github.com/orangenpresse/ArduinoRP2040-ButtonBox
The author marked this model as their own original creation.