The small, blue multi-turn potentiometer controls the sensitivity threshold.
Triggers automatic water faucets, hand sanitizers, or paper towel dispensers when hands approach. Limitations and Troubleshooting
Acts as a proximity trigger for alarms or lighting automation. Troubleshooting and Limitations Fc 51 Ir Sensor Datasheet
What you are using (Arduino, ESP32, Raspberry Pi)? What is your target obstacle material ?
The datasheet for the FC-51 IR sensor provides the following key specifications: Troubleshooting and Limitations What you are using (Arduino,
The FC-51 module features a simple 3-pin or 4-pin interface (most common variants use 3 pins) that allows for direct connection to microcontrollers like Arduino, Raspberry Pi, or ESP32. Description Positive power supply (3.3V to 5V) GND Ground connection (0V) OUT Digital output pin (LOW = Obstacle, HIGH = No Obstacle)
: Triggering actions when a user's hand or an object gets close. Quick Tips for Use Description Positive power supply (3
The LM393 voltage comparator compares the receiver's signal against a threshold set by the onboard potentiometer.
When working with the FC-51 IR sensor, keep the following tips and precautions in mind: