本程序使用P89V51单片机利用起PCA功能对脉冲宽度可调，实现两路输出，加LED显示和按键功能，详细请看程序注释，编程风格自认可以...

KG.rar的全部，用KIL就可以打开，是一个开关控制程序，有LED显示接口和一个2*2健盘接口，开关时间的频率和周期可以调节。 -KG.rar of all, you can open with KIL is a switch control procedures, has LED display interface and a 2* 2 Kin-disk interface, switching frequency and cycle time can be adjusted.

基于51单片机MAX7219的接口及编程应用程序，采用汇编语言编程制作。-MAX7219 single-chip microcomputer 51 based on the interface and programming applications, the use of assembly language programming produced.

使用68HC705J1A写的一个键盘的代码,包括资料说明,一份难得的资料,本人开发键盘时好不容易才找到的资料-68HC705J1A use of a keyboard to write code, including the information note, a rare information, I developed the keyboard is not easy to find when the information

一个单片机字码编程的好工具，解决了汉字字码编程的麻烦

该程序模块包含无线收发模块 NREF905的所有功能库函数 本库函数与外部函数接口简单易用且代码规范简洁-The program module contains the wireless transceiver module NREF905 all the features of library functions of the library function and the external function interface is simple and concise code norms

nrf905通信 基于rs232-nrf905 based RS232 communication

用AT89C2051实现程序A/D转换程序，用PWM模拟输出。-Procedures using AT89C2051 realize A/D conversion process, using PWM analog outputs.

基于Ramtron公司的VRS51L3074高性能8位单片机的MP3(VS1003)驱动程序,程序在Keil环境编译,程序内自带一段15K左右的MP3文件,可以直接播放测试.-Based on Ramtron" s VRS51L3074 high-performance 8-bit microcontroller MP3 (VS1003) drivers, programs, the environment in the Keil compiler, the program comes with a 15K or so inside the MP3 files can play test.

usb下载线，可以完全取代并口下载，为没有并口的笔记本提供方便。-usb download cable, you can completely replace the parallel port to download, there is no parallel port for the notebook with ease.

步进电机加减速运行程序 步进电机启动时，转速由慢到快逐步加速 步进电机匀速运行 步进电机由快到慢逐步减速到停止-Stepper motor stepper motor deceleration run the program starts, the speed gradually from slow to fast speed stepper motor stepper motor run by a uniform approaching slowly and gradually slow down to stop