一、紫外 LED 只是其中一环，不能独立完成全部鉴伪            紫外（UVA，典型 365nm）LED 核心作用是荧光检测：                            检测钞票纸张是否含有荧光增白剂，假钞常用普通木浆纸，紫外下会泛白；                            激发钞……

Generally, there are 0.06W, 0.5W, 1W, 3W, 5W, etc. according to a single LED lamp bead. Low power LED lamp beads: Low power (such as 5mm straw hat, 5mm spotlight, 3528 package, etc.), 0.06W. Medium power LED lamp beads: (such as 8mm straw hat shape, 10mm straw hat shape, 5050 package, etc.) 0.2W-0.5W. Compared to low-p……

There are two types of infrared receivers: photodiodes and phototransistors. Photodiodes convert light signals into electrical signals, while phototransistors also amplify electrical signals. Therefore, phototransistors are also divided into two types, namely NPN type and PNP type. There is a glass lens on the shell of……