With a 5-mm vertical slot, 0.5-mm aperture, 0.4-mm resolution and a 10% (typ.) current transfer ratio, the TCST1210 transmissive optical sensor is designed to provide highly accurate sensing of ...
Here is a motor speed sensor module, the major goal is to check the rate of an electric motor. The module can be used in association with a microcontroller for motor speed detection, pulse count, ...