產品說明1
Arduino 光線傳感器 模擬傳感器 互動媒體
2012年最新推出的Arduino Light Sensor是基於半導體的光電效應原理所開發的光線傳感器，其可用來對周圍環境光的強度進行檢測，結合各種單片機控制器或者Arduino控制器可實現光的測量、光的控制和光電轉換等功能，此傳感器3P插針接口，可通過3P傳感器連接線（不分模擬與數字連接線）與Arduino專用傳感器擴展板結合使用，可以製作光感相關的互動作品。
What is a photocell?
Photocells are sensors that allow you to detect light. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason they often appear in toys, gadgets and appliances. Theys are are often referred to as CdS cells (they are made of Cadmium-Sulfide), light-dependent resistors (LDR), and photoresistors.
Photocells are basically a resistor that changes its resistive value (in ohms Ω) depending on how much light is shining onto the squiggly face. They are very low cost, easy to get in many sizes and specifications, but are very innacurate. Each photocell sensor will act a little differently than the other, even if they are from the same batch. The variations can be really large, 50% or higher! For this reason, they shouldn't be used to try to determine precise light levels in lux or millicandela. Instead, you can expect to only be able to determine basic light changes
For most light-sentsitive applications like "is it light or dark out", "is there something in front of the sensor (that would block light)", "is there something interrupting a laser beam" (break-beam sensors), or "which of multiple sensors has the most light hitting it", photocells can be a good choice!
