Connecting the sensor to a 9V battery, a 12V power supply, or an unregulated power source will force too much current through the onboard resistors and the LM393 chip.
The FC‑51 is very straightforward to connect to any microcontroller. It uses a standard 3‑pin 0.1″ header:
2cm – 30cm (Adjustable via onboard potentiometer) Detection Angle: 35° fc 51 ir sensor datasheet hot
If it despite correct 5V wiring, the internal logic gates are permanently shorted. The module is dead and must be replaced.
: When an obstacle is in front of the sensor, the on-board Pico LED lights up, and "Obstacle detected!" is printed to the console. Connecting the sensor to a 9V battery, a
Ensure your multimeter is set to DC voltage and measure the exact output of your power source.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. The module is dead and must be replaced
Let’s break down the —its official specs, why it runs hot, and when “hot” becomes a problem.