Adafruit Infrared IR Remote Transceiver - STEMMA JST PH 2mm - 940nm Emitter + 38KHz Receiver

The cable provides four distinct connections: the Red wire is for 3V to 5V power input (VCC), the Black wire is ground (GND). The White wire carries data from your microcontroller to the IR LED for transmission. The Green wire outputs the demodulated signal from the IR receiver to your microcontroller's input pin.

The board is designed to operate with a supply voltage between 3.0V and 5.0V DC. This range covers both 3.3V and 5V logic levels, making it directly compatible with most common microcontrollers like Arduino Uno, Raspberry Pi GPIO (using 3.3V logic), ESP32, and others without requiring a level shifter.

The integrated receiver is tuned to 38kHz, which is the standard carrier frequency for most consumer IR remotes. It will demodulate and output a clean digital signal for protocols like NEC, Sony SIRC, and RC-5. Decoding the specific protocol and command must be handled in software on your connected microcontroller using libraries like IRremote.

For Arduino: Connect the Red wire to 5V, Black to GND, Green to a digital input pin, and White to a digital output pin. For Raspberry Pi (3.3V logic): Connect Red to 3.3V, Black to GND, Green to a GPIO input pin, and White to a GPIO output pin. Always use a current-limiting resistor for the White (TX) line if your GPIO pin cannot source the LED's 100-200mA directly; the board may include this internally.