KY-040 Rotary Encoder Module Brick Sensor Development For Arduino The Keyes KY-040 rotary encoder is a rotary input device (as in knob) that provides an indication of how much the knob has been rotated AND what direction it is rotating in. Its a great device for stepper and servo motor control. You could also use it to control devices like digital potentiometers. Product information By rotating https://elecena.pl/product/16455256/ky-040-rotary-encoder-module-brick-sensor 2020-04-14 https://elecena.pl/product/16455256/ky-040-rotary-encoder-module-brick-sensor 2020-09-01 https://elecena.pl/product/16455256/ky-040-rotary-encoder-module-brick-sensor 2021-03-02 https://elecena.pl/product/16455256/ky-040-rotary-encoder-module-brick-sensor 2025-07-09