(Optional: Connect an LED via a 220Ω resistor to Pin 13 for onboard LED indication.)
Supports a flexible range from 3.0V to 6.0V , making it compatible with both 3.3V (Raspberry Pi/ESP32) and 5V (Arduino) systems.
Always test your specific module’s range with your target object before finalizing your design.
The operational limits of the module heavily dictate its deployment in embedded systems: 3.0V to 6.0V DC (Standard TTL levels) Current Consumption: ~23 mA at 3.3V | ~43 mA at 5.0V
The FC-51 can run on 3.3V, making it safe for Pi GPIO. Use the same pinout but connect VCC to 3.3V.