Hongyan Technology EC11A5EA Rotary Encoder Plastic Handle 16.5mm

The EC11A5EA is designed for standard digital logic levels. It is typically operated at 3.3V or 5V DC. Always verify the specific datasheet for your batch, but connecting VCC to 5V and using a pull-up resistor on the output pins is a common configuration for Arduino and other microcontroller systems.

Connect the encoder's VCC and GND pins to your Arduino's 5V and GND. Connect the A and B output pins to two digital input pins configured with internal pull-up resistors. Use a library like the Arduino Encoder library to handle the quadrature decoding, which will track position and direction based on the phase relationship between the two signal channels.

Yes, most variants of the EC11A series, including the EC11A5EA, integrate a momentary push-button switch activated by pressing down on the shaft. This is available on a separate pin, providing a combined rotary and switch input in a single compact component, ideal for menu selection and confirmation actions.

While the exact PPR can vary, the EC11A5EA model typically provides 20 pulses per mechanical revolution (20 PPR). Each pulse corresponds to one detent or 'click' feel. Note that due to the quadrature output, a full 4-state cycle per pulse allows for higher resolution reading if the controller firmware supports it.