Fc 51 Ir — Sensor Datasheet Hot
const int sensorPin = 2; // IR sensor output pin const int ledPin = 13; // Built-in LED
Instantly causes overheating and potential destruction of the chip. Short Circuit: A short between VCC and OUT, or OUT and GND. D. Damaged Components
The FC-51 relies on an to deliver clean, jitter-free digital signals. This architecture ensures the module remains highly stable across fluctuating ambient lighting conditions. Hardware Performance Data Specified Rating / Value Operating Voltage 3.0V to 6.0V DC (Highly stable at 3.3V & 5V) Current Consumption ~23 mA @ 3.3V | ~43 mA @ 5.0V Detection Distance Range 2 cm to 30 cm (Configurable via onboard trimmer) Detection Field of View IR Light Wavelength 940 nm (Invisible near-infrared spectrum) Output Signal Type TTL Digital Logic (Active LOW configuration) Physical PCB Footprint 3.1 cm × 1.4 cm Onboard Visual Indicators Power Status LED & Obstacle Activation LED 2. Pinout Configuration and Hardware Architecture
The is one of the most popular, affordable, and essential components in the hobbyist and professional robotics community. Whether you are building an automated line-following robot, a smart parking system, or a basic collision detection mechanism, the FC-51 offers a reliable solution. fc 51 ir sensor datasheet hot
If your microcontroller supports 3.3V logic (like an ESP32, Raspberry Pi, or Arduino Due), power the FC-51 with 3.3V instead of 5V. This reduces the overall current draw and keeps the module operating much cooler.
2cm to 30cm (Adjustable via the onboard multi-turn potentiometer) Detection Angle: 35 degrees Key Onboard Components
The clear IR LED itself and its adjacent SMD resistor become hot, rather than the LM393 chip. Step-by-Step Troubleshooting and Solutions const int sensorPin = 2; // IR sensor
5. Why is My FC-51 IR Sensor "Hot"? (Troubleshooting High Temperature)
The LM393 chip becomes burning hot within seconds of applying power. If left connected, it will permanently destroy the IC. 2. Overvoltage (Exceeding 5V DC)
“When the car passes the sensor too quickly, it seems the sensor does not trigger… I can see the obstacle LED flash when the object passes, but in many cases (over 70% of time) the timer either does not start or does not stop.” Damaged Components The FC-51 relies on an to
If the sensor was wired backward even for a few seconds, the LM393 IC might already be fried. Disconnect the sensor completely from your circuit. Set your multimeter to continuity mode. Probe between the sensor's VCC and GND pins.
Approx. 23mA at 3.3V and up to 43mA at 5V