{"product_id":"ky-018-photoresistor-sensor-module","title":"KY-018 Photoresistor Sensor Module for Arduino \u0026 ESP32","description":"\u003ch2 data-path-to-node=\"8\"\u003e\u003cb data-path-to-node=\"8\" data-index-in-node=\"0\"\u003eGive Your Projects the Gift of Sight\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"9\"\u003eIn the world of smart electronics, detecting environmental changes is key to automation. The \u003cb data-path-to-node=\"9\" data-index-in-node=\"93\"\u003eKY-018 Photoresistor Sensor Module\u003c\/b\u003e is the standard for reliable, low-cost light detection. Whether you are a STEM student learning the basics of analog signals or an engineer prototyping a smart garden system, this module provides the precision you need without the complexity.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"10\"\u003e\u003cb data-path-to-node=\"10\" data-index-in-node=\"0\"\u003eHow It Works\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"10\"\u003eAt its core, this module utilizes a high-quality Light Dependent Resistor (LDR). Its internal resistance changes drastically based on the ambient light hitting the sensor head.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"11,0,0\"\u003e\n\u003cb data-path-to-node=\"11,0,0\" data-index-in-node=\"0\"\u003eIn Bright Light:\u003c\/b\u003e Resistance drops, allowing more current to flow (higher signal voltage).\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,1,0\"\u003e\n\u003cb data-path-to-node=\"11,1,0\" data-index-in-node=\"0\"\u003eIn Darkness:\u003c\/b\u003e Resistance increases, reducing current flow (lower signal voltage).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"12\"\u003eBy reading these analog voltage changes with a microcontroller (like an Arduino), you can program triggers—such as turning on an LED when the room gets dark.\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eWhy Choose the KY-018?\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"13\"\u003eUnlike raw components that require breadboarding complex voltage dividers, the KY-018 comes pre-soldered on a durable PCB with a 10kΩ pull-down resistor included. This \"Plug-and-Play\" design saves you time and ensures a stable signal reading right out of the box.\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":46812902686871,"sku":"21PS001232","price":42.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/ky-018-photoresistor-module-front-view.jpg?v=1768387080","url":"https:\/\/scccltd.com\/en-tw\/products\/ky-018-photoresistor-sensor-module","provider":"Sun Cheong Computer Company Limited","version":"1.0","type":"link"}