altium designer原理元件库封装库包含各种常用元件库 电容 电阻 声亮器件 插件 继电器类器件78稳压系列 常用单片机 开关 等-Principle component library packaging library contains a variety of commonly used components library capacitance resistance sound light device plug-in relay device 78 voltage regu

常用的有源晶振封装库和原理图库，AD环境。(AD environment commonly used active crystal package library and schematic library)

一些常用厂家器件的3D封装库，仅用于参考学习，不可作为商业用途(3D Packaging Library of some commonly used devices)