常用SCH零件库,protel学习必备.

this is a telephone sofe

Universal Serial Bus (USB) is a communications architecture that gives a personal computer (PC) the ability to interconnect a variety of devices using a simple four- wire cable. The USB is actually a two-wire serial communication link that runs at either 1.5 or 12 megabits per second (mbs). USB protocols can configure devices at startup or when they are plugged in at run time. These devices are broken into various device classes. Each device class defines the common behavior and protocols for devices that serve similar functions. Some examples of USB device classes are shown in the following table

lpd8803/8806是深圳英盛美半导体公司09年出品的新款高性能led驱动芯片，该芯片具有如下特点： 三/六路输出，恒流驱动；直接256级PWM输出，无亮度损失，降低数据传输量，有效减少电磁干扰(EMI)。 扫描频率高（约4000HZ）。 仅需时钟线/数据线的两线传输结构，级联能力超强。 内建振荡器，支持FREE-RUN模式，降低控制电路成本，输出耐压高（LED灯供电电压可达12V）。 简化外围配套，可扩充性好，也可作为PWM发生器控制大电流器件驱动大功率LED灯。 该芯片特别适合用于led幕墙灯、led全彩点光源、广告字、异型屏等产品，相对于9712/6106/595/5026/62726等芯片来说，外围器件少，电路简单， 布线容易，使用电线节省，控制器也简单。-Datasheet for LPD8803 & LPD8806

Windows Mobile 开发资源,介绍了一些开发资源，很好。-Windows Mobile development resources, introduce a number of development resources, very good.

人事管理系统 利用powerbuilder -Personnel Management System using PowerBuilder

短时间熟练PROTEL DXP操作，分为： smthome_protel_DXP_教程.part1.rar smthome_protel_DXP_教程.part2.rar smthome_protel_DXP_教程.part3.rar-PROTEL DXP short of skilled operations, divided into: smthome_protel_DXP_ tutorial. Part1.rarsmthome_protel_DXP_ tutorial. Part2.rarsmthome_protel_DXP_ tutorial. Part3.rar

AnirOCX - An OCX to add remote control support to your Windows applications-AnirOCX- An OCX to add remote control support to your Windows applications

此程序的功能是用c语言实现编译原理课程中的语法分析程序-this procedure is the function of c language compiler theory courses syntax analysis program

I2C读写24c系列存储器，不需修改可以直接使用。单片机为51系列。-i2c

虚拟串口 驱动 需要转换卡 而且新开辟的要在串口附近-Virtual serial port driver required conversion to open up the card and want a new serial at the vicinity of