project3

简单打字速度练习，采用倒计时10分钟进行速度练习。(Simply typing speed exercises for 10 minutes using the countdown speed exercises.)

利用ULN2003A进行驱动，产生PWM波，里边有照片，可供参考，通过本例程了解PWM 的基本原理和使用 (#include <reg52.h> unsigned char timer1 sbit PWM=P1^2 void system_Ini() { TMOD|= 0x11 //PWM TH1 = 0xfe //11.0592 TL1 = 0x33 TR1 = 1 IE =0x8A } main() { system_Ini() while(1) { if(timer1>100) timer1=0 if(timer1<30) PWM=0 else PWM=1 } )

说明：  基于单片机的电阻测量系统，带vb上位机控制和显示同时还有无线发射(MCU-based resistance measurement system with vb PC control and display as well as a wireless transmitter)

实用CAN与上位机通讯例程，适用于基于CAN总线的自动系统参考。(Practical CAN and PC communication routines for automated reference system based on CAN bus.)

通过代码动态操作菜单、浮动菜单、鼠标键盘编程实等(Through the dynamic operation of the code menu, floating menu, mouse, keyboard and other programming is)

飞思卡尔16位单片机无线遥控程序，供初学者开发学习(Wireless remote control program)

窗体与界面设计，弹出菜单应用实例，在控件上单击右键弹出菜单(Forms and interface design, pop-up menu, application examples, in the control, right-click pop-up menu on the)

实现用单片机控制直流电机调速功能，可用，有hex文件(Achieve MCU control DC motor speed control function is available, a hex file)

当时间到时，蜂鸣器提醒，并有音乐提示。 时间可以自己设定，可以最小化到托盘。(time)

pc rs232 51单片机 LED 控制(pc rs232 51 microchip LED control)