本次做的数字日历是以单片机（AT89C51）为核心，结合相关的元器件（共阴极LED数码显示器、BCD-锁存/7段译码/驱动器74LS164等），再配以相应的软件，达到制作简易数字日历的目的，其硬件部分难点在于元器件的选择、布局及焊接。-The figures do bell on SCM (AT89C51) at the core, Combined with the components (a total of cathode LED digital display, BCD- latch

在NI_Multisim中创建自定义元器件的方法！-In NI_Multisim the method of creating custom components！

很全的PROTEL99SE元器件查找清单，对学习PROTEL的人员很适用。希望大家喜欢。-The very wide PROTEL99SE components Find a list of learning the PROTEL the staff is very applicable. I hope you like it.