DigiboxEN
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Product ID: DG1039
KY-040 Rotary Encoder + Knob
600 DA
The KY-040 is a mechanical rotary encoder with a built-in push-button, ideal for detecting rotational direction and position in embedded systems, user interfaces, and DIY electronics.
- Category: Motion & Rotation Sensors
- Stock: In stock
600 DA
In stock
1
About this item
🌀 KY-040 Rotary Encoder Module
💡 Incremental Encoder with Button Switch
The KY-040 is a compact, mechanical rotary encoder with a built-in push-button switch. It detects direction and step count of rotation and is ideal for adjusting values, navigating menus, or building interactive interfaces in embedded systems.
🛡️ Mechanical Reliability
- 🔁 Rotates 360° continuously
- 🔘 Integrated push-button (press the shaft)
- 🧲 Tactile feedback with 20 detents
- 🔌 Standard 5-pin header (GND, +, SW, DT, CLK)
📦 Compact & Versatile
With its small footprint, low power requirements, and compatibility with 3.3V and 5V systems, it’s a popular input device in DIY and prototyping projects.
🛠️ Applications
- 🎛️ Volume or menu controls
- 🤖 Arduino / ESP32 / Raspberry Pi user interfaces
- 🕹️ DIY control knobs or game controllers
- 🔁 Motor control input (step/feedback)
- 📟 Digital potentiometers
- 🧮 Rotary position tracking
⚠️ Notes
- 🧷 Debouncing (hardware/software) may be needed for clean signals
- ⏱️ Works best with interrupts for high-speed detection
- 📘 Outputs digital pulses, not analog values
- 🔄 Can rotate infinitely in either direction
✨ Key Features
- 📏 Steps per revolution: 20 (mechanical detents)
- 🔋 Operating voltage: 3.3V–5V
- 📦 5-pin interface: Easy jumper wire connection
- 🔄 Encoder type: Incremental (quadrature output)
- 🔘 Built-in switch: Momentary press on shaft