Fc 51 Ir Sensor Datasheet __top__ Jun 2026

The infrared emitting tube continuously shoots out a beam of high-frequency infrared light.

Understanding the output logic is crucial for programming. The FC-51 outputs a . By default (most modules), the logic is:

When no object is present, the light disperses, and the IR receiver detects no signal. The OUT pin remains . Fc 51 Ir Sensor Datasheet

int sensorPin = 2; int ledPin = 13; int sensorState = 0;

Understanding the hardware physical layout helps in tuning and troubleshooting the device: The infrared emitting tube continuously shoots out a

| Parameter | Value | |-----------|-------| | Response Time | ~2–10 ms | | Output Frequency | ~50–100 Hz (typical) | | Settling Time after power-up | <50 ms |

The FC-51 module is built around the , making it highly stable and accurate for digital detection tasks. Specification Model Number FC-51 (IR Obstacle Avoidance Sensor) Operating Voltage 3.0V - 6.0V DC Detection Range 2cm - 30cm (Adjustable via potentiometer) Detection Angle Comparator IC Output Type Digital Output (Low when obstacle, High when clear) Current Consumption ≈ 23mA @ 3.3V, ≈ 43mA @ 5.0V Dimensions 4.5cm × 1.4cm × 0.7cm LED Indicators Power (Red), Obstacle Detected (Green) 2. FC-51 Pinout Configuration By default (most modules), the logic is: When

Note on 4-pin versions: Some FC-51 modules break out an additional pin, which provides the raw analog voltage from the phototransistor before it goes into the comparator. This can be used for measuring distance more precisely.

const int irSensorPin = 7; // FC-51 OUT connected to pin 7 const int ledPin = 13; // Built-in LED

Digital Output pin. Outputs a Low (0V) signal when an obstacle is detected and High (3.3V/5V) when no obstacle is present. 3. Working Principle

This comprehensive guide serves as an extended datasheet and technical manual for the FC-51 IR sensor module. It covers physical specifications, pin configurations, internal circuitry, operating mechanisms, and practical programming examples. Module Overview and Specifications