plc

说明：  用PCF8591AD/DA模块连接51单片机，实现AD转换并在LCD1602上显示值(Using pcf8591ad / DA module to connect 51 single chip microcomputer to realize AD conversion and display value on LCD1602)

机器人PID控制，对于机器人而言，PID控制是比较简单且行之有效的控制方法，在工业机器人中得到了广泛的应用。(PID control robot, the robot terms, PID control is a relatively simple and effective method of controlling the industrial robot has been widely used.)

它是一个可以记录用户键盘操作的间谍软件。黑客可利用此软件记录用户输入的信息。此软件和病毒完全不同，是正规软件，目前大概有两类软件。一类是模仿操作，用途是做重复操作 　　按键精灵就是其中之一；还有一类是用于家庭监控的软件，如梦真工作室开发的键盘屏幕全记录。(The virus is completely different from a regular software, currently there are about two types of software. A class is to imitate the operation use repeat QuickMacro there is a class of software for home monitoring, keyboard screen Full Record dream real studio.)

基于90s2313的计算机并口频率计，有图纸和源代码(Parallel computers based 90s2313 frequency meter, there are drawings and source code)

For this project you need a 3.7v power supply that prepared by LM317 regulator. So you need MAX232 for connect uart to pc .my AVR chip project is Mega8 that you can program on any Avr chip have 2kbyte rom. In bascom spi hardware don’t work correct, so I have to software spi ,but the software spi configure have low speed into hardware spi.

PCB设计接地指导书,指导pcb设计及人员更好的设计PC版(PCB design ground, guide the pcb design and make better PC version of the design)

键盘测试，测试键盘的好坏,小测试,够了没(keyboard test)

private static final long serialVersionUID.

Application client / server Server Appplication

The ebook and solution manual of Eugene Hecht optics book which is very standard in US universities