{"title":"Adafruit ALS-PT19 Analog Light Sensor Breakout","handle":"adafruit-als-pt19-analog-light-sensor-breakout","url":"/products/adafruit-als-pt19-analog-light-sensor-breakout","description":"The Adafruit ALS-PT19 is a compact analog light sensor that provides a simple voltage output proportional to ambient light intensity. Its spectral response closely matches that of the human eye, thanks to a high infrared rejection ratio — making it ideal as an RoHS-compliant upgrade from traditional photocells.\n\nWiring is straightforward: connect power (2.5–5.5V), ground, and read the analog voltage on the OUT pin. The voltage increases as the sensor detects more light.\n\nKey Features\n\n\nAnalog Output – Simple voltage output proportional to light level, read with any ADC\n\nHuman-Eye Spectral Response – High infrared rejection for accurate ambient light sensing\n\nWide Voltage Range – Operates from 2.5V to 5.5V\n\nRoHS Compliant – Suitable for projects requiring lead-free components\n\nCompact Breakout – Tiny PCB with simple three-pin interface\n\n\nIdeal For\n\nAmbient light level detection\nAutomatic backlight or LED brightness control\nDay/night sensing\nReplacing photocells in RoHS-compliant designs\n\n\nPackage Contents\n\n1× Adafruit ALS-PT19 Analog Light Sensor Breakout\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":10327,"title":"Default Title","sku":"AF-2748","price":5.11,"on_sale":false,"in_stock":true,"available_quantity":102,"option1":"Default Title"}]}