Adafruit
Adafruit Infrared IR Remote Transceiver - STEMMA JST PH 2mm
· MPN: ADA5990
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The Adafruit Infrared IR Remote Transceiver combines a high-powered IR transmitter and a sensitive 38 kHz IR receiver on a single board. With two 940 nm IR L...
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The Adafruit Infrared IR Remote Transceiver combines a high-powered IR transmitter and a sensitive 38 kHz IR receiver on a single board. With two 940 nm IR LEDs (one vertical, one horizontal) driven by an onboard N-channel FET at 100–200 mA per LED, you get 10+ metres of transmit range alongside a demodulated receiver output — all in a solderless STEMMA JST PH package.
Connect with a single 4-pin JST PH cable: power, ground, data in (to IR LEDs), and data out (from IR receiver). Yellow status LEDs labelled "IN" and "OUT" blink to indicate transmit and receive activity respectively.
Key Features
- Combined Transmitter & Receiver – Send and receive 940 nm, 38 kHz IR remote signals from one board
- High-Power IR Transmitter – Two IR LEDs with FET driver; 200 mA per LED at 5V (400 mA total pulsing)
- 10+ Metre Range – Dual LED orientation (vertical + horizontal) for wide coverage
- 38 kHz IR Receiver – Demodulated signal output ready for microcontroller decoding
- STEMMA JST PH 2 mm Connector – Solderless 4-pin connection (power, ground, data in, data out)
- 3V – 5V Compatible – ~200 mA total at 3V or ~400 mA total at 5V when transmitting
- Status LEDs – Yellow "IN" LED for transmit activity and yellow "OUT" LED for received signals
- Breadboard Option – 0.1" header pads available for soldered connections
Ideal For
- IR remote control transmitter and receiver projects
- Home automation IR blasters with receive feedback
- Universal remote control systems
- Projects needing both IR send and receive without two separate boards
Package Contents
- 1× Adafruit Infrared IR Remote Transceiver Board (assembled and tested)
Important: This board does not use I2C. The 4-pin JST PH cable carries: red = 3–5V power, black = ground, white = data to IR LEDs, green = demodulated IR signal from receiver.
Note: STEMMA JST PH cable not included. This board is for 940 nm, 38 kHz IR remote control signals only — not suitable for proximity sensing or other frequencies. Your microcontroller must support pulse-input reading and IR decoding.
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 38 kHz IR
- Infrared light that is switched on and off 38,000 times per second, a common carrier frequency used by IR remotes and beam sensors. Matching this frequency matters because the receiver is tuned for it and will ignore much of the steady or random infrared light in the environment.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- JST PH
- A small keyed plug-and-socket connector with 2 mm pin spacing, often used for low-power electronics connections. You need the correct JST PH cable, and its current rating limits how much power should be passed through it.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- N-channel FET
- A type of transistor commonly used as a low-side electronic switch for controlling power to LEDs, motors, and other loads. Knowing this helps explain why the board can drive more current than a microcontroller pin could handle on its own.
- pH
- A measure of how acidic or alkaline a liquid is, on a scale where 7 is neutral. For a water monitoring kit, pH tells you about water chemistry and whether the included probe matches the range and accuracy your project needs.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
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