Adafruit has made an I2C interface for four rotary encoders. It comes in the form of a PCB with four footprints that accept one of the most common rotary encoder forms (Bournes PEC11 horizontal style) ...

“The Encoder Pad can be programmed with CircuitPython ... the EncoderPad is based on the MACROPAD Hoykeys example for the Adafruit Macropad RP2040 which is part of the Adafruit Learning System ...

The build uses an Arduino Uno, SD card shield, and Adafruit’s new NeoPixel strip ... using a rotary encoder attached to a bicycle. With the rotary encoder pressed up against the wheel of a ...