Magnetic Rotary Encoder - 128 P/R (Quadrature) w/ Switch - SparkFun Electronics

The CS19D128B is a high-quality magnetic rotary encoder from Cooka, offering smooth, low-friction rotation with 128 pulses per revolution and no detent positions. Pressing the shaft activates a built-in push switch.

Unlike mechanical encoders, the magnetic sensing mechanism allows this encoder to withstand a far greater number of rotations before experiencing wear. It provides standard 2-bit quadrature output (A and B channels) and works with both 3.3 V and 5 V systems.

Key Features

• Magnetic Sensing – No mechanical contacts, greatly extending lifespan
• 128 PPR – High resolution with smooth, detent-free rotation
• Built-in Switch – Push-to-click function on the shaft
• Quadrature Output – A/B square wave output for direction and position sensing
• Dual Voltage – Compatible with 3.3 V and 5 V logic
• 6 mm Shaft – Standard shaft diameter (not compatible with ¼″ knobs)

Ideal For

• Menu navigation and user interface controls
• Precision dial input for microcontroller projects
• Audio equipment and synthesiser controls
• Any application requiring smooth, continuous rotation sensing