KY-040 Rotary Encoder

Unlike a potentiometer, the encoder can be turned endlessly in one direction, and the module detects the direction of rotation. In addition, there is a button that is actuated by pressing the encoder. The module is suitable for navigating menus and for controlling motors, similar to a handwheel on CNC machines.

Recommended Accessories:

• Knob for rotary potentiometer 6mm
• Dupont Cable M-F 20cm 20 Pieces

Features:

• Endless rotation with detection of the direction
• Button in the encoder: SW is pulled to ground when actuated
• 3 × 10 kΩ resistors on the board
• D-shaft with threaded bushing
• Angled pin header soldered on
• Library: RotaryEncoder, found in the Library Manager under Encoder

Application Examples:

• Navigating menus
• Setting values
• Moving motors by hand, similar to a handwheel on CNC machines

Documentation:

• Rotary encoder with Arduino tutorial (Last Minute Engineers)
• RotaryEncoder library (GitHub)

Technical Data:

• Type: KY-040
• Operating voltage: 5 V
• Resolution: 20 pulses per revolution
• Connections: CLK, DT, SW, +, GND
• Weight: 7 g

Scope of Delivery:

• 1× Encoder module