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The Rotary Encoder Module is a rotation sensor with digital output designed for slot sensing, encoder feedback, speed counting, and position detection. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Working voltage: 0 – 5V.; Interface: Digital GPIO; Size: 32 x 19 x 30 mm..
Important: Motion sensors often need calibration in software to get the best accuracy. Mounting angle and vibration can change the result.
Why you’ll love it
- Power range: 0 – 5V.
- Compact size: 32 x 19 x 30 mm.
- Useful spec: Incremental Encoder.
- Easy wiring: Digital GPIO
- Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
- Common controller support: Works well with Arduino, ESP32, Raspberry Pi, and similar boards
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Rotary Encoder Module | rotation sensor with digital output | Current item |
| Rotary Encoder EC11 Module | rotation sensor | model EC11 |
| Rotation Sensor Rotary Encoder Analog | rotation sensor with analog output | analog output |
| Rotary Angle Sensor Grove | rotation sensor with analog output | analog output |
What you can build
This sensor is a good fit for wheel encoders, slot sensors, paper-feed monitors, shaft counters, and motor feedback.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard and jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include a microcontroller board, jumper wires, and pull-up or pull-down support when needed, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Rotary Encoder Module |
|---|---|
| Model | KY-040. |
| Working voltage | 0 – 5V. |
| Size | 32 x 19 x 30 mm. |
| Type | Incremental Encoder. |
| Weight | 10 gm. |
| Material | PCB + Brass. |
| Cycles per revolution (CPR) | 20. |
| Interface | Digital GPIO |
Wiring & usage notes
Connect power and ground, then wire the output pin to a digital GPIO input. Check whether the module uses active-high or active-low logic in your code. Motion sensors often need calibration in software to get the best accuracy. Mounting angle and vibration can change the result.
What’s in the box
1 × Rotary Encoder Module
Frequently Asked Questions
What does the Rotary Encoder Module measure?
It is designed to measure motion, tilt, rotation, or orientation.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this Digital GPIO sensor?
This sensor provides a digital switching-style signal that is easy to read from a GPIO pin.
Does it need calibration?
Usually yes. Motion sensors often benefit from software calibration to improve offset, drift, and orientation accuracy.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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