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对于闭环控制有很好的说明以及pid算法的具体实现(Specific implementation for closed-loop control has a good explanation and pid algorithm)

用VC进行单片机的串口通讯，并进行数据采集，进行处理以后在PC端显示(VC MCU for serial communication, and data collection, processing beyond the PC to display)

绿灯亮时，准许车辆通行，黄灯闪烁时，已越过停止线的车辆可以继续通行；没有通过的应该减速慢行到停车线前停止并等待，红灯亮时，禁止车辆通行。给行人看的叫人行横道灯，通常指由红、绿（绿为蓝绿）二种颜色灯组成用来指挥交通通行的信号灯，红灯停，绿灯行。(When the green light is on, the vehicle is allowed to pass. When the yellow light is flashing, the vehicles that have crossed the stop line can continue to pass.You should slow down to stop and wait at the stop line. No traffic is allowed when the red light is on.Pedestrian crossing lights for pedestrians, usually denoted by red, green (green, blue, green), two color lamps used to direct traffic signals, stop at red lights and green.)

锁相环用于电机转速精准检测，资料很不错，值得下载(Phase-locked loop for accurate detection of motor speed)

这是用c语言写的利用扬声器放歌的程序,可以编译一下就可使用(useful)

51单片机开发步进电机源代码及报告解释说明(a progress of 51MCU introduction)

基于STC89C51RC的水平倾角XYZ检测仪(Horizontal dip XYZ detector STC89C51RC)

说明：  红外编码发生器程序 自己编写 调试成功 大家可以看看(IR code generator program written to debug their success we can see)

时钟的应用源代码，可以让初次设计有关定时操作的人员借鉴。 (Clock application source code, allowing designers about the timing of the initial operation of reference.)

sine signal graphic visual c++ platform?????enter the frequency and the amplitude