Digital TTL (Low level when an obstacle is detected, High level when clear) Onboard Comparator: LM393 chip for stable signal processing Dimensions: 32mm × 14mm
The FC-51 module breaks out its connections into a simple 3-pin or 4-pin header (depending on the specific manufacturer variant, though 3-pin is standard). Description Power Input Connects to 3.3V – 5V power supply. GND Connects to the system ground. OUT Digital Output Fc 51 Ir Sensor Datasheet
When an object or obstacle enters the sensor's field of view, the emitted IR light bounces off the surface of the object. Digital TTL (Low level when an obstacle is
3.0V to 6.0V DC (Typically used at 3.3V or 5V). Current Consumption: ~23 mA at 3.3V. ~43 mA at 5.0V. Fc 51 Ir Sensor Datasheet