Fc 51 Ir Sensor | Datasheet Hot
Always calibrate using the actual objects your system will encounter. If you need consistent range regardless of surface, consider a time‑of‑flight (ToF) sensor or a sharp IR distance sensor.
By understanding the FC-51 IR sensor datasheet and taking necessary precautions, John was able to successfully complete his project and ensure reliable operation of his robot.
“When I looked at the two LEDs on the board I tried to re‑align them a bit. The two LEDs are very sensitive. When I pushed the two LEDs toward each other, the detection distance went to more than 35 cm (though a bit unstable). I finally got the right setup around 30 cm and fine‑tuned it with the potentiometer to 20 cm.” – Arduino Forum user fc 51 ir sensor datasheet hot
The FC-51 IR sensor, a popular choice among robotics enthusiasts, was known for its reliability and accuracy in detecting obstacles. However, on this particular day, something was amiss. As soon as the team powered on the sensor, it began to overheat, spewing out erratic readings and causing the entire system to malfunction.
If the reflection is strong enough (closer object), the OUT pin goes LOW and the signal LED turns on leetechbd.com/product/infrared-obstacle-avoidance-module-fc-51/. If no object is detected, the OUT pin stays HIGH . Always calibrate using the actual objects your system
If an obstacle is present, the IR light reflects off it.
| Feature | FC‑51 (IR Reflective) | HC‑SR04 (Ultrasonic) | Sharp GP2Y0A21 (Analog IR) | | :--- | :--- | :--- | :--- | | Detection Type | Digital (object present / absent) | Analog (time‑of‑flight distance) | Analog (distance via reflection angle) | | Range | 2 cm – 30 cm adjustable | 2 cm – 400 cm | 10 cm – 80 cm | | Cost | Very low (< $2) | Low | Moderate | | Ambient Light Immunity | Poor | Excellent | Poor | | Works with Transparent Objects? | No | Yes | No | | Best For | Near‑range, binary detection (obstacle avoidance, counting) | Medium‑range distance measurement | Continuous distance sensing | “When I looked at the two LEDs on
A proximity sensor should not generate noticeable heat under normal 3.3V–5V operation. If it is hot to the touch, check the following: Arduino Forum