{"product_id":"adafruit-ltr-303-light-sensor-stemma-qt-qwiic","title":"Adafruit LTR-303 Light Sensor","description":"\u003cp\u003eThe Adafruit LTR-303 Light Sensor a simple and popular low-cost I2C digital light sensor that is easy to integrate into your project for reliable and wide-ranging light measurements.\u003c\/p\u003e\n\u003cp\u003ePerfect for a wide range of project use cases: Should we turn up the brightness of our display or dim it to save power? Which direction should your robot move to stay in an area with the most light? Is it day or night? All of these questions can be answered with the help of the LTR-303. It's a small, capable and inexpensive light sensor that you can include in your next project to add the detection and measurement of light.\u003c\/p\u003e\n\u003cp\u003eThe LTR-303 provides 16-bit light measurements for both Infrared and Visible+IR spectrums. Subtract one from the other to get human-visible light. Thanks to configurable gain and integration time settings, the LTR-303 can measure from 0 to 65K+ lux.\u003c\/p\u003e\n\u003cp\u003eThe 303 (compared to the '329) also comes with alert and IRQ capabilities so you can have a pin trigger when the reading goes above or below threshold values. Great if you want ultra-low power usage. \u003ca href=\"\/en-eu\/products\/adafruit-ltr-329-light-sensor-stemma-qt-qwiic\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eIf you don't need a version with interrupt output, check out the Adafruit LTR-329 which is basically the same sensor but without the IRQ capability.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eSensors tend to come in small packages and the LTR-303 is no different. Not much bigger than a grain of rice, this handy light-sensing friend needs some help to be used by folks experimenting and without the desire or tools to work with surface mount parts. Adafruit are here to help!\u003c\/p\u003e\n\u003cp\u003ePackaged on a PCB in the STEMMA QT form factor, the LTR-303 comes integrated with a voltage regulator and level shifting circuitry to allow it to be used with 3.3V devices, like a Feather M4 or Raspberry Pi, or 5V devices, such as an Arduino. Rather than working with the itty bitty little contacts on the sensor, the PCB it's packaged on breaks out all the pins to a standard 0.1\" \/ 2.54mm pitch header.\u003c\/p\u003e\n\u003cp\u003eTo make things easier and a bit more flexible, Adafruit have also included \u003ca href=\"\/en-eu\/collections\/qwiic\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSparkFun Qwiic\u003c\/a\u003e compatible \u003ca href=\"\/en-eu\/collections\/stemma-qt\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSTEMMA QT\u003c\/a\u003e connectors for the I2C bus so you don't even need to solder! Just plug in a compatible cable and attach it to your MCU of choice, and you’re ready to load up some software and measure some light. \u003ca href=\"\/en-eu\/products\/jst-sh-cable-qwiic-stemma-qt-compatible\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eQT Cable is not included, but we have a variety in the shop.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_CircuitPython_LTR329_LTR303\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eTo help with the software part Adafruit have written a library that you can use with CircuitPython \/ Python devices as well as computers like the Raspberry Pi by installing it using PyPi.\u003c\/a\u003e You can even use it on a full-sized computer by using an \u003ca href=\"\/en-eu\/products\/adafruit-mcp2221a-breakout-general-purpose-usb-to-gpio-adc-i2c-stemma-qt-qwiic\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eMCP2221 breakout\u003c\/a\u003e. \u003cstrong\u003eArduino\u003c\/strong\u003e users can use this \u003ca href=\"https:\/\/github.com\/adafruit\/Adafruit_LTR329_LTR303\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eLTR-303 Arduino library with lots of examples\u003c\/a\u003e to get started fast.\u003c\/p\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eLTR-303ALS-01 Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eI2C interface with up to Fast Mode @ 400kbit\/s with address 0x29 (cannot be changed)\u003c\/li\u003e\n\u003cli\u003eUltra-small ChipLED package\u003c\/li\u003e\n\u003cli\u003eBuilt-in temperature compensation circuit\u003c\/li\u003e\n\u003cli\u003eLow active power consumption with standby mode\u003c\/li\u003e\n\u003cli\u003eOperating temperature range from -30 C to +70 C\u003c\/li\u003e\n\u003cli\u003eRoHS and Halogen free compliant\u003c\/li\u003e\n\u003cli\u003eLight Sensor close to human eye spectral response\u003c\/li\u003e\n\u003cli\u003eImmunity to IR \/ UV Light Source\u003c\/li\u003e\n\u003cli\u003eAutomatically rejects 50 \/ 60 Hz lighting flicker\u003c\/li\u003e\n\u003cli\u003e6 dynamic ranges from 0.01 lux to 64k lux\u003c\/li\u003e\n\u003cli\u003e16-bit effective resolution\u003c\/li\u003e\n\u003cli\u003eInterrupt output capability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProduct Dimensions: 25.3mm x 17.7mm x 4.8mm \/ 1.0\" x 0.7\" x 0.2\"\u003c\/p\u003e\n\u003cp\u003eProduct Weight: 1.9g \/ 0.1oz\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn-shop.adafruit.com\/product-files\/5610\/LTR-303ALS-01-Lite-On-datasheet-140480318.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eLTR-303 Datasheet\u003c\/a\u003e\u003c\/p\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":40313358418003,"sku":"ADA5610","price":4.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/5610-00.jpg?v=1745607443","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/adafruit-ltr-303-light-sensor-stemma-qt-qwiic","provider":"Pimoroni Ltd","version":"1.0","type":"link"}