> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # Adafruit STEMMA Reflective Photo Interrupt Sensor - TCRT1000 **Type:** Product page · **SKU:** ADA5913 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/adafruit-stemma-reflective-photo-interrupt-sensor-tcrt1000.html ([markdown](https://core-electronics.com.au/adafruit-stemma-reflective-photo-interrupt-sensor-tcrt1000.html.md)) An optical reflective sensor is a composite electronic device with two elements - an IR LED and an IR photo-transistor. The IR LED blasts light, and when... ## Pricing - **Price:** $8.95 (inc GST) — $8.14 AUD, exc GST - **Quantity discounts:** 10+ $7.89 (exc GST) · 50+ $7.73 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 19 and Aug 24. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA5913:1` (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/ADA5913:1.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 An optical reflective sensor is a composite electronic device with two elements - an IR LED and an IR photo-transistor. The IR LED blasts light, and when something bounces the light back to the photo-transistor, the transistor turns on and the amount of current flowing through it increases. This makes the sensor great at detecting when something is in front of the sensor: when nothing is there the IR light never gets reflected back and the transistor stays off. Adafruit have two versions of this sensor that are 'breadboard' friendly, the [ITR20001](https://core-electronics.com.au/miniature-reflective-infrared-optical-sensors-5-pack-itr20001-t.html) and a chunky all-in-one [Infrared Reflective Sensor](https://core-electronics.com.au/reflective-ir-sensor-with-470-and-10k-resistors.html), but both are tough to mount, and require wiring up with resistors to get working. To make usage super fast and no-soldering-or-breadboarding-required, the **Adafruit STEMMA Reflective Photo Interrupt Sensor** is ready to go out of the box. Power it with 3 to 5V DC and read the signal off the output pin to quickly detect reflective surfaces. A green LED tells you that the board is powered, and a red LED will light up to let you know when the phototransistor is activated. (Both LEDs can be disabled) Onboard Adafruit have a [TCRT1000 right-angle sensor module](https://www.digikey.com/en/products/detail/vishay-semiconductor-opto-division/TCRT1000/1681165). A potentiometer allows adjustment of how bright the IR emitter is, turn it all the way down for about 1mA, turn it all the way up for about 100mA. Then the receiving phototransistor is biased with a 10K pullup. When no IR light is detected, the output signal pin is high. When IR is bounced back, the voltage will drop down towards 0V. This board has a simple plug-and-play JST PH (2mm pitch) input connector for solderless use. For use with a CircuitPlayground or micro:bit, this [JST to alligator-clip cable](https://core-electronics.com.au/jst-ph-3-pin-plug-to-color-coded-alligator-clips-cable.html) works best. Red is power, ground is black and signal is white. For use with a breadboard, [try this JST to male/plug-header](https://core-electronics.com.au/jst-ph-3-pin-to-male-header-cable-200mm.html). (We also have a [socket-header cable](https://core-electronics.com.au/jst-ph-3-pin-to-female-socket-cable-200mm.html) if you want) ## Technical Details ![RoHS 2 2011 65 EU Compliant](https://core-electronics.com.au/attachments/localcontent/RoHS2_2011_65_EU_7356c5574c.svg)![RoHS 2 2015 863 EU Compliant](https://core-electronics.com.au/attachments/localcontent/RoHS2_2015_863_EU_86773f57f9.svg) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5913-1.jpg)