If you are integrating this sensor into your microcontroller project, you will need the to understand the sensor's effective angle (< 35°) and current consumption. While often sold as a generic "blue board," the module is based on the LM393 comparator, ensuring a clean digital signal output.
void setup() pinMode(SENSOR_POWER, OUTPUT); pinMode(SENSOR_OUT, INPUT);
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.
: Digital (outputs 0 when an object is detected and 1 when the path is clear). fc 51 ir sensor datasheet hot
If your sensor is running hot to the touch, it is likely due to one of the following "hot" issues:
Ensure that the pin connected to the FC-51 OUT pin is explicitly configured as an input in your code. For Arduino, ensure your setup contains: pinMode(sensorPin, INPUT); Use code with caution.
As they worked, they stumbled upon an obscure forum post from a robotics enthusiast who had encountered a similar problem. The user, 'ElectroGuru,' had shared a modified datasheet with additional thermal characteristics, which seemed to match the FC-51's behavior. If you are integrating this sensor into your
Source: Arduino tutorial example.
The LM393 comparator compares the intensity of the received light with a threshold set by the potentiometer.
Arduino code snippet:
Sample Arduino logic (pseudocode):
2cm – 30cm (Adjustable via onboard potentiometer) Detection Angle: 35°
If you accidentally connect the OUT pin directly to the VCC or GND rails of your breadboard without a microchip pin limiting the current, it can cause an internal short inside the LM393 IC. When a player’s hand covers a dome, the