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Full machine-readable index: https://core-electronics.com.au/llms.txt # Adafruit Infrared IR Remote Transceiver - STEMMA JST PH 2mm - 940nm Emitter + 38KHz Receiver **Type:** Product page · **SKU:** ADA5990 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/adafruit-infrared-ir-remote-transceiver-stemma-jst-ph-2mm-940nm-emitter-38khz-receiver.html ([markdown](https://core-electronics.com.au/adafruit-infrared-ir-remote-transceiver-stemma-jst-ph-2mm-940nm-emitter-38khz-receiver.html.md)) We've got a high-powered infrared emitter board, and a super-sensitive infrared remote receiver board - but why buy two boards when you can pick up... ## Pricing - **Price:** $11.10 (inc GST) — $10.09 AUD, exc GST - **Quantity discounts:** 10+ $9.79 (exc GST) · 50+ $9.58 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 27 and Aug 31. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA5990:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA5990:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description Adafruit have got a [high-powered infrared emitter board](https://core-electronics.com.au/adafruit-high-power-infrared-led-emitter-stemma-jst-ph-2mm.html), and a [super-sensitive infrared remote receiver board](https://core-electronics.com.au/adafruit-infrared-ir-remote-receiver-stemma-jst-ph-2mm.html) - but why buy two boards when you can pick up one that does both? This board is the **Adafruit Infrared Tranceiver breakout**, which can transmit and receiver 940nm remote control data in one handy solder-free package. **Please Note:** to make this board easy to use, Adafruit have both solder-able breakout pads and also a JST PH 4-pin cable. Adafruit often use JST PH cables for I2C but this board ***does not use I2C*** - the white wire is data from a microcontroller to be emitted over the IR LED, the green wire is demodulated IR remote signal data to a microcontroller. The black wire is ground, red wire is 3V~5V power and logic level. For the emitter half, Adafruit use the [same schematic and setup as Adafruit's "High Power IR LED Emitter" breakout](https://core-electronics.com.au/adafruit-high-power-infrared-led-emitter-stemma-jst-ph-2mm.html), with an onboard N-Channel FET driver, to blast 100mA-200mA of current pulsing through each LED for 10+ meters of range! One LED is vertical and one is horizontal so you get tons of coverage. If powering with 5V, the board will draw about 200mA per LED (400mA total) when pulsing on. If powering with 3V the board will draw about 100mA per LED (200mA total). Since you can't see IR with a human eyeball, Adafruit have a small yellow LED labeled 'IN' that will blink when the IR LEDs are on. For the receiver half, Adafruit use the [same 'vertical' IR sensor in Adafruit's "IR Receiver breakout"](https://core-electronics.com.au/adafruit-infrared-ir-remote-receiver-stemma-jst-ph-2mm.html) The sensor is designed to recognize remote control style modulated signal at 38KHz and 940nm wavelength. The demodulated IR envelope is piped out the OUT labeled pin into your microcontroller which will then need to decode it. To make debugging easy, there's a second yellow LED labelled "OUT" that will blink when data is received. Each STEMMA board is a fully assembled and tested PCB, but no cable. No soldering is required to use it, but you will need to pick up [a 2mm pitch, 4-pin STEMMA JST PH cable](https://core-electronics.com.au/jst-ph-4-pin-to-male-header-cable-i2c-stemma-cable-200mm.html). Alternatively, if you *do* want to solder, there's a 0.1" spaced header for power/ground/signals. Note that this board is specifically for receiving 940nm 38KHz IR remote control signals - it isn't going to work for proximity/distance sensing or other frequency signals. The signal must be read by a microcontroller that has pulse-input reading capabilities - basically just check that it supports common IR Receiver connectivity and decoding. Sometimes you need to use special code or pins. ## Technical Details Product Dimensions: 25.5mm x 17.7mm x 7.2mm / 1.0" x 0.7" x 0.3" Product Weight: 2.0g / 0.1oz ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5990-1.jpg)