实现从文件中读取相关信息，生成相应的哈夫曼编码，并将其写入文件中

串口与pc机通讯，51单片机例程，只需要修改io口即可实现。(Serial communication with pc, 51 MCU routine, you only need to modify the io port can be realized.)

说明：  基于51单片机的数字直流电压表相关材料，内容有原理图，仿真文件，论文材料，程序源码等。(The related materials of digital DC voltmeter based on 51 single chip computer include schematic simulation files, paper materials, program source code, etc.)

二叉树在非递归算法中，后序遍历难度大，很多书上只给出思想或者几段无法直接调试的代码，甚至有些书上是错的，当时我在研究的过程中，就是按着书上错误的代码绕了好半天，几预抓狂。好在最终摸索出来了(Binary Tree in non-recursive algorithm, after the preorder is difficult, given the many books just thinking or paragraphs not directly debugging code, and even on some of the books is wrong, I was in the process of the study, according to the book is error code around for ages, a few pre-crazy. Fortunately, the final fumble out)

基于PSCAD/EMTDC的感应电动机负荷模型对电压恢复的影响。(Influence PSCAD/EMTDC induction motor load model based on voltage recovery.)

说明：  本设计利用现代电子技术、传感器技术等，设计出一款测量准确、简单易用，造价便宜的电子心率计。此心率计总体包括了红外心率检测电路、前端信号处理电路、控制电路和电源转换电路。并用C语言编写控制程序，实现对电路的控制。(This design uses modern electronic technology, sensor technology, etc. to design an electronic heart rate meter with accurate measurement, simple use and low cost. The heart rate meter includes infrared heart rate detection circuit, front-end signal processing circuit, control circuit and power conversion circuit. The control program is written in C language to realize the control of the circuit.)

解密工具 解密工具 解密工具 解密工具

能够很好的获取文件的路径信息源码。 根据路径能够遍历路径下的文件。 适合学习用。(Can be a good source to get the file path information. According to traverse the path of the file path. Suitable for learning.)

说明：  基于zigbee CC2530开发的光敏传感器(Photosensitive Sensor Based on Zigbee CC2530)

普通PC键盘作为输入设备与单片机串行连接，通过单片机解码PS2键盘，七段数码管显示按下的键值，是把键盘作为输入扩展的不错的例程，源码采用KEIL C编写。(keyboard input)

望指教．．我是初学的，写得可能不简便，是用Ｃ来写的．-hope the exhibitions. . I was a novice, may not be written in simple and C write.