Fc 51 Ir Sensor Datasheet Hot Upd Jun 2026

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

If your FC-51 IR sensor is overheating, it is usually a sign of a wiring error, excessive voltage, or a damaged component. This comprehensive guide combines essential datasheet specifications with practical troubleshooting steps to help you cool down your sensor and get your project working safely. Technical Specifications (Datasheet Summary)

: When an obstacle is in front of the sensor, the OUT pin goes LOW, the built-in LED on pin 13 lights up, and you see "Obstacle detected!" in the Serial Monitor. fc 51 ir sensor datasheet hot

Adjustable between 2cm and 30cm using the onboard potentiometer. Detection Angle: Approximately 35°.

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Acts as the brain, comparing the analog voltage from the photodiode against the reference voltage set by the potentiometer.

void loop() sensorState = digitalRead(sensorPin); // Read the sensor's state if (sensorState == LOW) // If an obstacle is detected digitalWrite(ledPin, HIGH); // Turn on LED Serial.println("Obstacle detected!"); else digitalWrite(ledPin, LOW); // Turn off LED This public link is valid for 7 days

void setup() pinMode(2, INPUT); // Correctly configures the pin to receive data safely Use code with caution.

Cheap manufacturing can sometimes result in solder bridges that short out the board straight out of the package. Alternatively, if the sensor was previously exposed to a voltage spike, the internal current-limiting resistors for the IR transmitter LED may have failed, allowing unrestricted current to melt the components. Step-by-Step Troubleshooting Checklist

While the FC-51 is excellent for beginners, it has specific limitations inherent to infrared technology:

Lights up when an object is within the set detection range.