usb 68013A芯片原理图和PCB图

基于PIC单片机的SPWM控制技术，详细介绍了使用面积相等法产生SPWM波。-PIC MCU-based SPWM control technologies, detailing the use of an area equal to France generate SPWM waves.

C51源代码，驱动74164》，这个程序太简单了，不过省得大家自己写了-C51 source code, drive 74164

ASIC在VB下的开发,集成了很多方便实用的ASIC开方指令及宏命令。-ASIC under the VB development, integration of a number of convenient and practical ASIC prescribing instructions and macro command.

基于５１单片机的乘法运算程序-SCM multiplication procedure

详细介绍MP3的编码原理,有大量图示,好看就要顶下,-Detail MP3 encoding principle, has a large number of icons, we should look under the roof,

定时器的操作通过定时器的操作完成系统的精确定时，-The operation of timer operation is completed through the timer system precision timing,

单片机控制I2C高频头！！能自动搜台，可红个遥控-Single-chip tuner I2C control! ! Can automatically search and Taiwan can be a red remote control

LED动态扫描.采用74164做为显示数据输出,使I/O口减少至两个,并且可做为驱动,是小系统LED显示的最佳方法-LED dynamic scanning. Using 74,164 as output data show that, I/O port reduced to two, but also to drive, is a small LED display system the best way

C51写的普通拼音输入法源程序。编译环境：Keil C 6.14。给广大的51爱好者学习交流使用。-C51 Writing Pinyin input method common source. Compiler Environment: Keil C 6.14. To the vast number of fans 51 communicate using the study.

用单片机蜂鸣器实现911报警声音，采用中断延迟实现输出频率的变换。-Used to achieve single-chip buzzer 911 sounds, using interrupt latency to achieve an output frequency of transformation.