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Full machine-readable index: https://core-electronics.com.au/llms.txt # Adafruit Infrared IR Remote Receiver - STEMMA JST PH 2mm **Type:** Product page · **SKU:** ADA5939 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/adafruit-infrared-ir-remote-receiver-stemma-jst-ph-2mm.html ([markdown](https://core-electronics.com.au/adafruit-infrared-ir-remote-receiver-stemma-jst-ph-2mm.html.md)) A year ago we designed a high-current-output Infrared Transmitter STEMMA which makes it easy to create high-powered IR LED blasters. Now we've sat... ## Pricing - **Price:** $9.50 (inc GST) — $8.64 AUD, exc GST - **Quantity discounts:** 10+ $8.38 (exc GST) · 50+ $8.20 (exc GST) ## Availability & dispatch - Out of stock — the product page offers email notification when it returns. ## Restrictions This product incorporates a laser system. Before purchasing or using laser equipment (including modules, components, or complete machines such as laser cutters and engravers), please consider the following: - These products are intended for professional, educational, industrial, or supervised workshop environments. - Operators should be appropriately trained and understand laser safety practices, including enclosures, signage, PPE, and safe operating procedures where applicable. A declaration of use will need to be submitted during checkout. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA5939:1` (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/ADA5939:1.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 A year ago Adafruit designed a high-current-output [Infrared Transmitter STEMMA](https://core-electronics.com.au/adafruit-high-power-infrared-led-emitter-stemma-jst-ph-2mm.html) which makes it easy to create high-powered IR LED blasters. Now Adafruit have sat down to design the other side, the super sensitive wide-range **Adafruit Infrared IR Remote Receiver** with two selectable IR receiver chips. Adafruit found plenty of 38KHz receiver sensors that would work nicely on this breakout board - but when it came to choosing one that was vertical or horizontal Adafruit just couldn't make up Adafruit's mind...so why not both? Adafruit have placed one on the end and one in the middle, and a slide switch to select which one you want to read signal from. Adafruit can't just tie the outputs together because they'd 'fight' each other and give incoherent output - but if you're willing to solder two wires, it's possible to read each one independently thanks to labelled breakout pads. Usage is simple: Power the board by connecting V+ and ground to 3~5VDC, point a 38KHz remote control at the sensors and press some buttons. The demodulated IR envelope is piped out the Signal pin into your microcontroller which will then need to decode it. To make usage really easy, Adafruit have a green 'power good' LED and a red 'signal' LED. When IR remote signals are read by the onboard sensors, the red LED will blink to let you know. This board will work nicely for a variety of IR remote receiving projects, and with mounting holes and a cable, a lot easier to mount in enclosures and on devices. Using a 2mm pitch STEMMA JST PH cable with headers or alligator clips on the end, you can easily wire this board without any soldering. Note that this board is specifically for receiving 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. 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, 3-pin STEMMA JST PH cable](https://core-electronics.com.au/search?q=jst+ph+3). Alternatively, if you *do* want to solder, there's a 0.1" spaced header for power/ground/signal. ## Technical Details Product Dimensions: 25.3mm x 17.7mm x 7.1mm / 1.0" x 0.7" x 0.3" Product Weight: 2.1g / 0.1oz ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5939-1.jpg)