KY-040 Rotary Encoder Module HW-040

The KY-040 Rotary Encoder Module (HW-040) is a versatile input device for Arduino and microcontroller projects. It detects both clockwise and counter-clockwise rotation and includes a push-button switch when the knob is pressed. Perfect for menu navigation, volume control, and motor speed adjustment in DIY electronics projects.

• Model: KY-040 / HW-040
• Operating Voltage: 3.3V – 5V
• Output: Digital pulse (A, B channels) + SW (push button)
• Pulses per Revolution: 20
• Pins: CLK, DT, SW, VCC, GND
• Compatible with Arduino, Raspberry Pi, ESP32, STM32
• Includes knurled aluminum knob cap