Hongyan Technology EC11J 5DM15P1ZY15F7 Horizontal Encoder with Switch 15mm Shaft - Incremental Pulse Rotary

The encoder provides a standard incremental quadrature output, consisting of two square wave channels (A and B) that are 90 degrees out of phase. This allows a microcontroller to determine both the amount of rotation and the direction by monitoring the phase relationship between the two signals.

Connect the encoder's VCC and GND pins to the Arduino's 5V and GND. The A and B phase output pins should be connected to digital input pins configured with internal pull-up resistors. The switch pin (if present) is another digital input, typically active-low, and also requires a pull-up resistor. Use a library like the Encoder library for reliable pulse counting and decoding.

The integrated momentary push-button switch provides a secondary digital input function. It is activated by pressing axially down on the encoder shaft. This is commonly used for 'select' or 'enter' commands in menu systems, allowing a single component to handle both scrolling/selection and confirmation actions, saving panel space and simplifying user interface design.

This encoder is designed for flank (side) mounting. It is typically secured by its bushing or flange using a nut from the front of the panel, with the shaft protruding through a pre-drilled hole. Ensure the panel thickness is compatible with the encoder's bushing length and that the mounting surface is flat to prevent shaft misalignment and ensure smooth rotation.