Rotary Encoder - 20 Pulse Incremental with Push Button
Rotary Encoder - 20 Pulse/Rev Incremental with Push Button
This rotary encoder is a mechanical incremental input device that translates shaft rotation into digital pulses. It provides 20 pulses per revolution with detents, plus a built-in momentary push switch. Commonly used for precise user input in microcontroller projects, it offers haptic feedback for accurate navigation and adjustment.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3V - 5V DC |
| Pulses per Revolution | 20 (with detents) |
| Switch Type | Momentary push button |
| Output Signal | Quadrature (two channels) |
| Shaft Dimensions | 6mm diameter, 15mm length |
| Pin Count | 5 (A, B, Button, VCC, GND) |
What You Can Build With This
- DIY volume controller for audio systems
- Navigation wheel for menu interfaces on OLED displays
- Motorized camera slider position control
- Digital potentiometer replacement for adjustable power supplies
Compatibility
This rotary encoder works with any 3.3V or 5V microcontroller like Arduino Uno, Nano, ESP8266, ESP32, and Raspberry Pi Pico. It connects directly to digital I/O pins without additional level shifting. Standard libraries like Encoder.h simplify reading rotation and direction.
Wiring Notes
Connect the A and B pins to interrupt-capable digital pins for accurate step reading. Use 10kΩ pull-up resistors on all signal lines if the microcontroller lacks internal pull-ups. The push button requires a 10kΩ resistor to VCC and a debounce capacitor or software debouncing.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, it works with all Arduino boards. Use the encoder library on digital pins 2 and 3 (interrupt pins) for reliable performance.
How many detents per revolution?
It has 20 detents per full rotation, giving you tactile feedback for precise positioning without looking at the knob.
Can the push button be used independently?
Absolutely. The momentary switch is completely independent of the encoder signals, with its own dedicated pin for user input.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items