Fc 51 Ir Sensor Datasheet Jun 2026

: Black or dark objects absorb IR light and may not be detected as easily as white or reflective surfaces.

Turn the potentiometer clockwise to increase sensitivity. Verify that your VCC pin is supplying a stable 5V. Scenario C: Unreliable behavior under bright lighting Fc 51 Ir Sensor Datasheet

While highly functional, the FC-51 has inherent limitations due to the physics of infrared light: : Black or dark objects absorb IR light

int sensorPin = 8; // Digital pin connected to the sensor's OUT pin int ledPin = 13; // Built-in LED on the Arduino board Scenario C: Unreliable behavior under bright lighting While

⚠️ Some versions of FC-51 have only 3 pins (VCC, GND, OUT). The EN pin is optional.

Emits infrared light at a specific frequency (usually 950nm).

~15mA (can directly drive a standard LED or small relay) Performance & Environmental Ratings