Fc 51 Ir Sensor Datasheet Hot ((exclusive))
Powering the module backward causes a dead short circuit through the LM393 IC and the protective/indicator diodes.
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Did the sensor run hot , or did it start over time? Share public link
The FC-51 is a popular, low-cost infrared (IR) obstacle avoidance sensor widely used in Arduino and Raspberry Pi projects. However, hobbyists frequently encounter a frustrating issue: the sensor module gets extremely hot to the touch. fc 51 ir sensor datasheet hot
Are you trying to (like a flame) with it?
To ensure safe, normal operating temperatures, implement the standard low-current circuit configuration below. Safe Wiring Scheme ➡️ Arduino 5V FC-51 GND ➡️ Arduino GND FC-51 OUT ➡️ Arduino Digital Pin 2 Safe Testing Code
Working on an obstacle avoidance robot or a line follower? The FC-51 Infrared Obstacle Avoidance Sensor is a staple for Arduino and ESP32 projects. If you are looking for the specs, pinouts, and technical details to get your build moving, check out the datasheet below. Powering the module backward causes a dead short
If your FC-51 is uncomfortably hot:
Both power and output LEDs are ON but weak/brighter than usual.
The FC-51’s simplicity, fast response, and immunity to ambient light (via modulated IR) make it perfect for non-contact, playful, or assistive interactions—turning mundane objects into responsive, intelligent interfaces. Safe Wiring Scheme ➡️ Arduino 5V FC-51 GND
delay(100); // Small delay for stability
Concerned about the overheating issue, John consulted the datasheet again. He discovered that the FC-51 IR sensor had a maximum power dissipation rating of 100mW. He suspected that the high ambient temperature and the sensor's internal heating might be causing the excessive heat.
Understanding FC-51 IR Sensor Heating: Datasheet Analysis and Troubleshooting