Bounce-Free Rotary Encoder Library
+ Standard or Multiplexed Wiring
+ Push Button Support
+ Callback System

• All common encoders with and without push buttons

• Directly connected encoders (A+B+Button to pins)

• Multiplexed encoders using

  • 74HC165 (up to 32 encoders)

  • 40HC67 (up to 16 encoders)

  • 40HC51 (up to 8 encoders)

  • Encoder Matrix

  • Easy to adapt for your preferred multiplexer

• Interrupt based or polled readout strategies

• PJRC Teensy (Teensy-LC, Teensy 3.x, Teensy 4.x, MicroMod)

• SAMD (SEEED XIAO, Nano33 ...)

• 8bit Arduino AVR (UNO, Nano, Mega...)

• ESP32

• Fallback solution for other boards (using slow digitalRead/Write)

• Fully bounce free readout without additional hardware

• Provides hard and cyclic count limits

• Supports and debounces encoder push buttons

• Modern callback system for event driven applications

• Encoders can be connected directly (A / B / Btn connected to pins)

• Encoder connection using various multiplexers (up to 32 encoders on only 4 control pins)

• Schematics and Gerbers available for multiplexed encoder boards (Eagle/KiCad).