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伟福LAB2000单片机仿真系统直流电机控制:利用实验仪上的D/A变换电路，输出-8V至+8V电压，控制直流电机。改变输出电.压值，改变电机转速，用8255 的PB.0 读回脉冲计数，计算电机转速。在电压允许范围内，直流电机的转速随着电压的升高而加快，若加上的电压为负电压，则电机会反向旋转。本实验仪的D/A变换可输出-8V到+8V的电压，将电压经驱动后加在直流电机上，使其运转。通过单片机输出数据到D/A变换电路，控制电压的高低和正负，观察电机的旋转情况。 在电机转盘上安装一个小磁芯，用霍尔元件感应电机转速，用单片机控制8255读回感应脉冲，从而测算出电机的转速。 -err

多位bcd码乘法,已测试通过,多位bcd码乘法,已测试通过-Bcd number multiplication code, have been tested, a number of bcd code multiplication, have been tested

汇编语言开发的经典教材，易学易用，深入浅出- The assembly language development classical teaching material, Yi Xueyi uses, to explain the profound in simple language

vb模拟雪花，想要电脑屏幕上有令人动容的雪花吗，想不到vb也能做到-vb simulated snow, want to have a computer screen you moving snow, can not think can be done vb

极为重要......所以无线心率监测器和温度传感器现在是一个天无线通信获得的步伐....即使是很小的事情，我们需要一个无线的机制....万一公共卫生其来非常方便。使用555定时器AMD89C52单片机，我们可以实现它

根据8051单片机的特点及交通灯在实际控制中的特点，本文提出一种用单片机自动控制交通灯及时间显示的方法.-According to the characteristics of 8051 and the traffic lights in the actual control of the characteristics of this paper, a single-chip automatic control with traffic lights and the time display method.

这是一个学生成绩管理系统，其中“I”表示插入，“L”表示浏览，“Q”表示查询， “E”表示退出，“D”表示删除，“M”表示修改,"c"表示统计各分数段人数,"p"表示打印. 本程序实现了： （1）单独运行以上各功能,即在进入主菜单以后，点一功能键后关闭，再进入主菜单 点别的功能键。如运行"cjgl"文件后,在出现的主界面中点“I”，可插入数据，插入完 以后，关闭；在出现的主界面中点“M”，可修改数据，修改完以后关闭，用同样的方法 可运行其它的功能。 （2）连续运行部分的功能。-This is a performance management system for students, "I" to insert said, "L" said View, "Q" said inquiries, "E" from "D" to delete said, "M" said the amendments, "c", said Statistics the fraction of the number of "p" said Print. this procedure was realized : (a) separate operations over the function, which is to enter the main menu after a point after the closure of function keys, and entered the main menu point other function keys. To run "cjgl documents" in the main interface midpoint "I" can be inserted in the data, insert, after closing; At the midpoint of the main interface, "M", may revise the data, modify, after the closure, the same

此驱动程序不同网上流通的驱动,是具有时用性,可移值性相当高,是真正能使用的驱动子程序!程序中宏定义很清楚-this driver online circulation of different drive is used, can shift relatively high value property, really use the driver subroutine! Acer process definition is very clear

应用背景应用于石器时代服务端编译时加入，lua技术支持。含lns接口，能在编译完成的端中附加各种脚本。使得服务器竞争力加大。关键技术Applied to the Stone Age server-side compile time to join, lua technical support.Contain LNS interface, can complete end of additional at compile various scripts.Make the server more competitive.

电子钟，数码管显示，可以调整。程序十分简单，思路清晰。-Electronic clock, digital display, you can adjust. Procedure is very simple, clear ideas.