SKU: TH2037
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Adafruit Infrared IR Remote Transceiver - STEMMA JST PH 2mm combines a high-power IR transmitter and a sensitive IR receiver on one compact breakout, making it easy to both send and receive common remote-control signals from a microcontroller.
The board is designed for 940nm, 38KHz IR remote control applications. On the transmit side, an onboard N-channel FET driver pulses two IR LEDs for strong output and wide coverage, while the receive side demodulates incoming IR remote data so your microcontroller can decode it.
You can use it with a solder-free 4-pin STEMMA JST PH connection or standard 0.1" breakout pads. Please note: this board does not use I2C even though it uses a 4-pin JST PH connector. It is intended for IR remote projects, not proximity or distance sensing.
Technical details for the Adafruit Infrared IR Remote Transceiver.
| Brand | Adafruit |
|---|---|
| Product Type | IR remote transceiver breakout |
| Operating Voltage | 3V to 5V DC |
| IR Receiver Support | 940nm, 38KHz remote-control signals |
| Emitter Drive | Onboard N-channel FET driver |
| Transmit Current | Approx. 100mA to 200mA per LED when pulsing, depending on supply voltage |
| Range | 10+ meters typical transmit range |
| Connectivity | STEMMA JST PH 4-pin, plus 0.1" breakout pads |
| Included | Fully assembled and tested PCB |
| Not Included | 4-pin 2mm pitch STEMMA JST PH cable |
Pin configuration for power, transmit, and receive connections.
| Pin | Name | Function |
|---|---|---|
| 1 | VIN | 3V to 5V power input. Match this to your microcontroller logic level. |
| 2 | GND | Common ground for power and logic. |
| 3 | IRout | IR transmit control input from your microcontroller to drive the onboard IR LEDs. |
| 4 | IRin | Demodulated IR receive output to your microcontroller for decoding remote signals. |
On the STEMMA JST PH cable, red is VIN, black is GND, white carries the received IR signal to the microcontroller, and green is the transmit signal from the microcontroller to the IR LEDs.
Status LEDs on the board help with debugging: one LED indicates transmit activity and another blinks when IR data is received.
This board is specifically for 940nm 38KHz IR remote protocols. It is not suitable for proximity sensing, distance measurement, or arbitrary IR frequencies.
Your microcontroller must support pulse-style IR input and decoding. Depending on the platform, you may need specific libraries, supported pins, or dedicated code for reliable operation.
It combines an IR transmitter and an IR receiver on one breakout, so a microcontroller can both send and receive 940nm remote-control signals. It is made for remote-control style IR data, not general light sensing.
The board is designed for 3V to 5V DC on VIN. Adafruit recommends powering it at the same logic level as your microcontroller, such as 3V for a Feather or 5V for an Arduino Uno.
No. Even though it uses a 4-pin STEMMA JST PH connector, this board does not use I2C; the wires carry power, ground, IR receive data, and IR transmit control.
Red is 3V to 5V power, black is ground, white carries the demodulated IR receiver signal to your microcontroller, and green is the control signal from your microcontroller to the IR LEDs. The board also has 0.1-inch breakout pads for soldered connections.
No. The receiver is specifically designed for 940nm, 38KHz modulated IR remote-control signals, so it is not intended for proximity, distance sensing, or other IR frequencies.
The product includes a fully assembled and tested PCB. A 2mm pitch 4-pin STEMMA JST PH cable is not included, so you will need one for solder-free use.
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