Hongyan Technology EC11B5AI Semicircle Rotary Encoder 19.5mm

The EC11B5AI is an incremental encoder that typically outputs a quadrature signal (channels A and B) to indicate both rotation and direction. Some variants may also include an index (Z) channel for a reference position per revolution. You must debounce the mechanical contact signals in your microcontroller code for reliable reading.

While the specific datasheet should be consulted, encoders in the EC11 series are commonly designed for a 5V DC supply. The internal switches and circuitry are rated for this logic level. Always verify the voltage rating before connecting to your system to prevent damage.

This encoder is designed for through-hole PCB mounting. The standard pinout consists of three pins: two for the common terminal and switch, and two for the quadrature outputs (A, B). You must align the pins with your PCB footprint and solder them in place. A pull-up resistor is typically required on each output line for proper signal reading by a microcontroller.