| Feature | FC-51 | TCRT5000 (Module) | Sharp GP2Y0A21 | | :--- | :--- | :--- | :--- | | | Digital (fixed threshold) | Analog (variable) | Analog (variable) | | Detection Range | 2-30 cm | 1-15 cm | 10-80 cm | | Distance Measurement | No (only threshold) | Possible with ADC | Yes (linearized) | | Ambient Light Reject | Moderate | Low | High (modulated) | | Cost | Very Low ($1-2) | Low ($2-3) | High ($10-15) | | Best For | Obstacle detection, line following | Short-range proximity | Distance sensing applications |
For those integrating the FC-51 into time-critical applications (e.g., high-speed object counting), the following timing parameters are important:
The onboard IR transmitter (clear LED) continuously emits infrared light at a specific frequency.
If the obstacle LED stays on constantly, the sensitivity is set too high, or the sensor is pointing directly at a highly reflective surface. Turn the potentiometer counterclockwise to reduce sensitivity.
Even a simple sensor like the FC-51 can exhibit issues. Here’s a troubleshooting guide:
Illuminates only when an obstacle is detected within the set range. 4. Pinout Configuration
What you are using (Arduino, ESP32, Raspberry Pi)? What is your target obstacle material ?
int sensorPin = 8; // Digital pin connected to the sensor's OUT pin int ledPin = 13; // Built-in LED on the Arduino board
: Helping vehicles navigate without hitting walls.
Fc 51 Ir Sensor Datasheet !!exclusive!!
| Feature | FC-51 | TCRT5000 (Module) | Sharp GP2Y0A21 | | :--- | :--- | :--- | :--- | | | Digital (fixed threshold) | Analog (variable) | Analog (variable) | | Detection Range | 2-30 cm | 1-15 cm | 10-80 cm | | Distance Measurement | No (only threshold) | Possible with ADC | Yes (linearized) | | Ambient Light Reject | Moderate | Low | High (modulated) | | Cost | Very Low ($1-2) | Low ($2-3) | High ($10-15) | | Best For | Obstacle detection, line following | Short-range proximity | Distance sensing applications |
For those integrating the FC-51 into time-critical applications (e.g., high-speed object counting), the following timing parameters are important:
The onboard IR transmitter (clear LED) continuously emits infrared light at a specific frequency. Fc 51 Ir Sensor Datasheet
If the obstacle LED stays on constantly, the sensitivity is set too high, or the sensor is pointing directly at a highly reflective surface. Turn the potentiometer counterclockwise to reduce sensitivity.
Even a simple sensor like the FC-51 can exhibit issues. Here’s a troubleshooting guide: | Feature | FC-51 | TCRT5000 (Module) |
Illuminates only when an obstacle is detected within the set range. 4. Pinout Configuration
What you are using (Arduino, ESP32, Raspberry Pi)? What is your target obstacle material ? Even a simple sensor like the FC-51 can exhibit issues
int sensorPin = 8; // Digital pin connected to the sensor's OUT pin int ledPin = 13; // Built-in LED on the Arduino board
: Helping vehicles navigate without hitting walls.
