模拟pwm实现灯的亮度，通过调节其输入脉冲的占空比来实现灯闪烁不是很明显又能看到亮度变化的功能

介绍单片机外围电路设计的一本基础书，做电子设计的朋友不可或缺的资料。-Introduced single-chip peripheral circuits design based on a book, to do electronic design information indispensable friend.

串口扩展芯片，可以扩展单片机的串口，使单片机的串口由一个变为3个甚至更多，降低成本。

LCD图形显示函数，很使用！-LCD display function, is used!

pj working with a compiler

基于c51开发的串口通讯程序。方便c51和电脑通讯-Developed based on the C51 serial communication program. C51 and computers to facilitate communication

时钟芯片DS1302及其在数据记录中的应用-Clock chip DS1302 and its application in the data record

利用LPC2131做的ZLG7290显示程序，采用IIC总线！-LPC2131 make use of the ZLG7290 display procedures, the use of IIC bus!

8位串行LED测试程序，带有字库文件，C51语言，KEIL uvision2下编译通过，并硬件调试通过-eight serial LED testing procedures, with character, C51, uvision2 under KEIL compiler, and hardware debugging through

PCA捕获功能原程序代码,初学单片机有用,代码已运行过,能用.-PCA capture the original program code, beginner Singlechip useful, the code has been in operation, and can be used.

AD9850 DDS控制子程序 经常做其他的单片机实验，还没做过DDS的实验。最近打算写个程序试验一下。 -AD9850 DDS control subroutine Singlechip often to do other experiments, not yet done DDS experiment. The recent plan to write a program to test.