Measure angle and direction of rotation with Arduino and rotary encoder

Gravity - 360 degree roatry encoder module - DFRobot SEN0502 Botland - Robotic Shop

How to convert the rotary encoder output to angle for this system? - Robotics - Arduino Forum

Incremental Photoelectric Rotary Encoder - 400P/R - DFRobot

How to use Rotary Encoder with Arduino - Full Guide

DIY Simple Arduino measurning wheel with Rotary encoder

Rotary Encoder, PDF, Switch

Why Use A Rotary Encoder - Soldering Mind

Measurino: A Measuring Wheel Proof of Concept

Using a rotary encoder on an Arduino, by Melanie Chow