The IR receiver module is represented here by IRRX, powered from a 5-Vdc supply. An infrared emitter (IRED) is available for changing the hardware as an IR encoder. LED1 indicates the IR signal ...

Thus, the output of the “set/reset” circuit (DIR, U2, pin 6) indicates the direction that the rotary encoder is turned. As mentioned previously, each pulse is delayed by the low-pass filter R1 ...