Telephone the working principle, has ringing circuit, Phone polarity protection...

LED驱动，简单通俗，易懂对初学者来说比较合适-LED driver, a simple pop and easy to understand and more suitable for beginners

双机通信过程中采用点对点通信的主机部分示例-Two-machine communication process used in peer-to-peer communications in the host part of sample

第 一章 电路原理分析 1-1 显示原理 1-2 数码管结构及代码显示 1-3 键盘及读数原理 1-4 连击功能的实现 第 二 章 程序设计思想和相关指令介绍 2-1 数据与代码转换 2-2 计时功能的实现与中断服务程序 2-3 时间控制功能与比较指令 2-4 时钟误差的分析 附录A 电路图 附录B 存储单元地址表 附录C 输入输出口功能分配表 附录D 定时中断程序流程图 附录F 调时功能流程图 附录G 程序清单 -clock circuit based on AT89C51

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里面含有含有5个不同的源代码。他们有是对51内部资源的编程，也有用avr编写的一些例子，希望对大家有帮助-containing five different source code. They have 51 of the internal resources of the program, avr also useful to prepare some examples, and I hope to be helpful

精电的12864驱动原码，asm和c.-Varitronix drive the original 12,864 yards, and c. asm

基于89C51单片机的洗衣机控制器，含SCH电路图以及C程序-Based on the 89C51 single-chip controller of the washing machine, including schematics, as well as C procedures SCH

这是一个IC卡智能水表程序,我已编译过可以用的.-This is a smart meter IC card, I have compiled can be used.

本代码以8051单片机做的，实现对电子钟的功能。功能包括四按键对电子钟的时间及年月日的调整，6LED数码管显示时间。各部分功能以模块写出，便于以后调用，对于初学单片机的朋友们会有很大帮助。-The code to 8051 to do, to achieve the electronic clock function. Features include 4 buttons on the electronic form of time and date adjustment, 6LED digital tube display time. All parts of capabilities to the module to write, easy to call the future, for beginners SCM would be of great help to my friends.

利用测量频率的方法进行运算 测量速度和里程，并用LED显示-The use of methods of measuring the frequency of computing the speed and length measurement, and LED display