精度为20位的数模转换芯片CS5503数据手册，有需要的朋友可以下来...

AT89c51单片机7279驱动键盘数码管程序-7279 driver keyboard AT89C51 single-chip digital control procedures

利用PWM和移位运算设计，并利用人眼的视觉 暂留现象产生移动，并拖影的动态发光效果-Use of PWM and displacement computing design and the use of the human eye

这是一个PIC实现音乐播放程序，程序是用汇编写的，调试通过-PIC to achieve this is a music player, the program is written in the compilation, debugging through

smart board 测试程序原代码-smart board the original test procedure code

非接触式无线巡更系统实现讲解，希望能给大家带来帮助-Non-contact wireless realize on Patrol System, I hope everyone can help

此程序可以实现两个单片机之间的相互通信；串口采用方式1工作，10位异步接受和发送，波特率可变，由定时器1控制；且含有校验-This program can be achieved between the two microcontrollers communicate with each other serial port mode 1 using the work of 10-bit asynchronous receive and send, variable baud rate, from Timer 1 control and contains a checksum

320x240LCM模块使用手册，一款非常好用的液晶显示模块，程序员开发十分方便！-320x240LCM module user manual, a very easy-to-use liquid crystal display modules, programmers to develop very convenient!

Hidden any program , and main program can hide in taskbar.-Hidden any program

用8253-8255编写的定时响铃程序 可以定时两个时间点，很经典的程序-spent 8253-8255 prepared by the regular beep procedures regular two points in time, classic procedures

使用DS12C887时钟芯片设计一个多功能时钟，在液晶上显示年月日星期时分秒并按秒更新，具有闹钟设定到时报警功能，可用按键随时调节各个参数。-DS12C887 clock chip designed to use a multi-functional clock, the LCD displays date and then every second week, when the second update, that time has set the alarm clock function keys can be used at any time adjust the various parameters.