{"product_id":"als-pt19-analog-light-sensor-breakout","title":"ALS-PT19 Analog Light Sensor Breakout","description":"\u003cp\u003eThe easiest way to make a project react to light. The \u003cstrong\u003eALS-PT19\u003c\/strong\u003e is a tiny phototransistor that responds to light much like the human eye does, so it reacts to the brightness you actually see and ignores most infrared.\u003c\/p\u003e\u003cp\u003eThere are just \u003cstrong\u003ethree pins\u003c\/strong\u003e: power, ground and output. The output is an \u003cstrong\u003eanalog voltage\u003c\/strong\u003e that gets higher as the room gets brighter. No library needed — just read it with \u003ccode\u003eanalogRead()\u003c\/code\u003e. That makes it a perfect first sensor for students and workshops.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e ALS-PT19 phototransistor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectral response:\u003c\/strong\u003e close to the human eye\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e analog voltage (higher = brighter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply voltage:\u003c\/strong\u003e 2.5–5.5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeaders:\u003c\/strong\u003e included, not soldered\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePin Definitions\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e+\u003c\/strong\u003e — Power in, 2.5–5.5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e−\u003c\/strong\u003e — Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOUT\u003c\/strong\u003e — Analog output — connect to an ADC pin\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProject Ideas\u003c\/h2\u003e\u003cp\u003eNight-time safety wear that lights up when it gets dark, a jacket that glows brighter in dim rooms, stage costumes that react to spotlights, or a light-meter lesson for your class.\u003c\/p\u003e\u003ch2\u003eGood to know\u003c\/h2\u003e\u003cp\u003eOn the ESP32, use an ADC1 pin: ADC2 pins stop working when Wi-Fi is on.\u003c\/p\u003e\u003ch2\u003ePair It With\u003c\/h2\u003e\u003cp\u003eGreat with beginner-friendly boards like the \u003ca href=\"\/products\/adafruit-gemma-m0-sewable-microcontroller\"\u003eAdafruit Gemma M0\u003c\/a\u003e, \u003ca href=\"\/products\/adafruit-flora\"\u003eAdafruit Flora V3\u003c\/a\u003e or \u003ca href=\"\/products\/beetle-esp32-microcontroller-sewable-1\"\u003eBeetle ESP32 [Sewable]\u003c\/a\u003e. Use our \u003ca href=\"\/products\/mixed-sampler-soft-silicone-wire-24-awg\"\u003esoft silicone wire sampler\u003c\/a\u003e for soft, flexible connections inside a garment.\u003c\/p\u003e\u003ch2\u003eIn the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eALS-PT19 light sensor board × 1\u003c\/li\u003e\n\u003cli\u003eHeader pins × 1 set\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tinker Tailor","offers":[{"title":"Default Title","offer_id":51926734242025,"sku":"TT-ALS-PT19","price":6.45,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/8006\/3209\/files\/S8fd66fa22f734cd4bdc47c97ef177d87d.webp?v=1790179599","url":"https:\/\/www.tinkertailor.ca\/products\/als-pt19-analog-light-sensor-breakout","provider":"Tinker Tailor","version":"1.0","type":"link"}