Fc 51 Ir Sensor Datasheet Hot | !!better!!

VCC → 5V, GND → GND, OUT → D2

If the received light exceeds the threshold, the OUT pin goes LOW (obstacle detected), and the indicator LED lights up. 3. Why Does the FC-51 IR Sensor Get Hot? (Troubleshooting)

A small screw on the potentiometer allows you to fine-tune the range.

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The module features a small blue potentiometer. Rotating this screw adjusts the threshold voltage.

If it is mistakenly set to OUTPUT , the microcontroller and the sensor will fight to control the voltage on that line, causing both to overheat. Step 4: Test for Internal Manufacturing Shorts VCC → 5V, GND → GND, OUT →

Digital signal (LOW when an obstacle is detected, HIGH otherwise). Dimensions: ~3.1cm x 1.4cm (PCB size). Pin Configuration

If the object detection LED is turned on, rotate the onboard potentiometer using a precision screwdriver until the indicator turns off.

One LED shows power status, while the second (usually green) lights up only when an obstacle is detected. (Troubleshooting) A small screw on the potentiometer allows

Cover each FC-51 with a colored plastic dome. When a player’s hand covers a dome, the sensor detects the reflection drop and lights up an LED. Build a “reaction time” game with just an Arduino and a few sensors.

void setup() pinMode(2, INPUT); // Correct configuration Use code with caution.

If using an external battery pack, ensure it uses a voltage regulator (like an L7805) to step down the voltage to exactly 5V. Step 2: Inspect the Wiring Connections

The FC-51 sensor operates on the principle of reflected infrared light.

Uses an LM393 comparator for stable and accurate digital switching. Key Features for Makers