SparkFun
Magnetic Rotary Encoder - 128 P/R (Quadrature) w/ Switch - SparkFun Electronics
· MPN: COM-27884
The CS19D128B is a high-quality magnetic rotary encoder from Cooka, offering smooth, low-friction rotation with 128 pulses per revolution and no detent posit...
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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
Jargon buster
Plain-language definitions for the technical terms used above.
- encoder
- An encoder is a sensor that converts the rotation or position of a shaft, knob or dial into electrical signals, reporting movement as incremental steps and direction, or as an absolute position. It is used to track how far something has turned, which matters for precise positioning, speed control, repeatable movement, or using a rotary knob as an input.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
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CS19D128B Rotary Encoder Datasheet
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Supplier page — sparkfun.com
Supplier Description · 469.9 KB · Click any page to view full size
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