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

The Adafruit Infrared IR Remote Transceiver combines both an infrared emitter and a 38KHz receiver in one compact, solder-free package, making it a versatile module for remote control projects.

This board features a 940nm infrared emitter and a matching receiver designed for 38KHz modulated signals. It includes an onboard N-Channel FET driver to pulse each LED with 100mA-200mA current, allowing transmission over 10+ meters. Two LEDs are oriented vertically and horizontally to provide wide coverage.

Powering at 5V draws approximately 400mA total when emitting; at 3V, it draws about 200mA total. A small yellow LED labeled 'IN' blinks when the IR LEDs are active to aid visibility.

The receiver section uses a vertical IR sensor for detecting remote control signals, outputting a demodulated IR envelope signal at 38KHz for microcontroller decoding. A second yellow LED labeled 'OUT' blinks on signal reception.

The board uses a 4-pin JST PH 2mm connector (STEMMA JST PH) but does not use I2C communication. Wiring: white (data out from microcontroller for emission), green (demodulated IR signal to microcontroller), black (ground), red (3V-5V power and logic).

No soldering is required if using compatible JST PH cables available separately. For those who prefer soldering, a 0.1” header is provided.

Note: This transceiver is specifically designed for 940nm wavelength at 38KHz modulated remote control signals, not for proximity sensing or other frequencies. Compatible microcontrollers need pulse-input reading and IR decoding capabilities.

• Integrated IR emitter and receiver in one board.
• 940nm wavelength IR LEDs with up to 10+ meters range.
• Two IR LEDs oriented for broad coverage.
• 38KHz modulated IR receiver for remote control signals.
• STEMMA JST PH 4-pin connector; cable sold separately.
• Yellow indicator LEDs for emission and reception activity.
• Compact dimensions: 25.5mm x 17.7mm x 7.2mm.
• Lightweight at 2g.