5Pcs KY040 Rotary Encoder Module 5V with Push Button and Knob Cap for Precise Position Control

Rotary encoder module with pushbutton reset, designed for precise position and menu control in embedded systems and user interfaces Key benefits Accurate incremental feedback: Provides 20 pulses per full rotation, enabling precise position sensing and fine adjustment. Bidirectional counting without limits: Counts pulses during rotation in both clockwise and counterclockwise directions with no practical limit on rotation. Builtin reset button: Integrated pushbutton returns the counter to the initial state so you can restart counting from zero for easy indexing and calibration. Sturdy, compact control knob: Supplied aluminium alloy knob cap is durable and comfortable to operate while maintaining a small footprint. Main functions and performance Working voltage 5V for direct compatibility with common 5V systems. 20 pulses per revolution for clear incremental steps during rotation. Counts both positive and reverse rotations; rotation counts are not limited, allowing continuous rotation and tracking. Pushbutton on the rotary encoder resets the count to zero, useful for calibration, menu selection, or returning to a baseline position. Physical specifications Knob cap material: aluminium alloy Knob cap size: diameter 15 mm 0.59 in, height 16.5 mm 0.65 in Compatibility and integration Designed for use with common microcontrollers and development boards that accept 5V incremental encoder inputs. Simple incremental output makes it suitable for direct interfacing with encoder counter libraries or interruptbased input handling. Lowvoltage operation and standard pulse output simplify wiring and software integration. Typical applications Audio and media controls: Adjust volume, track selection, or parameter tuning with precise steps and a reset option to to a reference point. Menu navigation and user interfaces: Scroll through menus, set values, and quickly reset selections to zero for configuration tasks. Embedded and robotics projects: Use as a rotary position input, encoder feedback for manual positioning, or fine adjustment in control panels. What to expect A compact rotary encoder that delivers reliable incremental feedback, a durable aluminium knob cap sized for compact panels, and a pushbutton reset for convenient resetting to the initial state. Easy to integrate into 5V systems for a variety of control and input tasks.