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LM393 Sensor Features The LM393 module is an IR counter that has an IR transmitter and receiver. If any obstacle is placed between these sensors, a signal is sent to the microcontroller. The module can be used in association with a microcontroller for motor speed detection, pulse count, position limit, etc. You can download the datasheet of this module here. [wpdm_package id='17841'] LM393 Sensor Pinout This sensor has 3 pins: VCC: Module power supply – 3-5.5 V GND: Ground OUT: Digital...