2 layers134.6 × 90.8 mm

Matrix
luni64/EncoderTool
The EncoderTool is a library to manage and read out rotary encoders connected either directly or via multiplexers to ARM based boards. Encoder push buttons are supported.
34 parts58MIT
KiCad boards from 5 GitHub repositories tagged “quadrature”, the most starred first; open any of them in PCBKit.

luni64/EncoderTool
The EncoderTool is a library to manage and read out rotary encoders connected either directly or via multiplexers to ARM based boards. Encoder push buttons are supported.

demik/quack
Bluetooth and ADB Mouse Converter for Macintosh 128/512/Plus, Apple Lisa and Apple IIc

PR77/CH554_USBQuadMouseKeyboard
CH554 based USB to Quadrature Mouse and Keyboard Interface

finngineering/sincos_interpolator
SinCos Interpolator to quadrature output

RCMgames/BSED
Byte Sized Encoder Decoder - Reads 8 quadrature encoders and communicates over I2C (and is qwiic compatible).