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The FC-51 has a standard 3-pin male header (0.1" spacing). Beware: The pin order differs between some clones; always check your board's silkscreen. Fc 51 Ir Sensor Datasheet
The FC-51 sensor module is designed for simplicity and reliability. Below are the core electrical and mechanical specifications: 3.3V to 5V DC Operating Current: ≥is greater than or equal to This public link is valid for 7 days
Adapted from public examples.
Decreases the detection distance threshold. Fc 51 Ir Sensor Datasheet