stm8s208s6 测试

本系统以直流电流源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电流，设置步进等级可达1mA，并可由数码管显示实际输出电流值和电流设定值。本系统由单片机程控输出数字信号，经过D/A转换器（AD7543）输出模拟量，再经过运算放大器隔离放大，控制输出功率管的基极，随着功率管基极电压的变化而输出不同的电流。单片机系统还兼顾对恒流源进行实时监控，输出电流经过电流/电压转变后，通过A/D转换芯片，实时把模拟量转化为数据量，再经单片机分析处理， 通过数据形式的反馈环节，使电流更加稳定，这样构成稳定的压控电流源。实际测试结果表明，本系统输出电流稳定，不随负载和环境温度变化，并具有很高的精度，输出电流误差范围±5mA，输出电流可在20mA~2000mA范围内任意设定，因而可实际应用于需要高稳定度小功率恒流源的领域。(the system to DC current source to the core, MCU AT89S52 main controller, through the keyboard to set up DC power supply output current, set up to 1mA Stepping grades, digital control can be shown by the actual output current value and current setting. The system consists of programmable microcontroller digital signal output, after the D/A converters (AD7543) analog output. After Operational Amplifiers isolation, amplification and control of the output power base. With the power of the base voltage changes in the output current. SCM system also takes on the constant current source for real-time monitoring, after current output current/voltage changes, the A/D converter chip, real-time conversion from analog to the volume of data and then analyzed by the MCU, through data link in the )

circiut battery charger used with inverter circiut

Qt实现Dll文件的调用和生成！Qt实现Dll文件的调用和生成！(Qt implementation of the Dll file calls and generate! )

说明：  DL/T860系列文档完整版，IEC61850通讯模型(DL / T860 series document complete version, IEC61850 communication model)

自己编写的几种经典的排序算法，里面有自己做的PPT详细讲解，希望有帮助吧(I have written several classic sorting algorithm, which own PPT explain in detail, I hope to help!)

画Bezier曲线的对话框,基于VC++程序开发，运行正确，图像直观(draw bezier)

说明：  用C语言实现二路归并排序，可供初学者参考(Using C language to achieve two - way merge sort, for beginners reference)

说明：  基于ODBC的数据库模式，用MFC创建一个学生成绩管理软件。程序的实现主要在视图Cstudentview类中完成，其中可以完成的功能有：显示全部记录、增加记录、删除记录、修改记录、排序记录、查寻记录，并且在控件表格中直观的显示。(based ODBC database model, the MFC with the creation of a student performance management software. The main procedures in achieving View Cstudentview category completed, which can be accomplished functions : All the records, record increase, delete records, modify records, sorting records, the searching of records, Controls in the form visual display.)

C# 使用Graphics对象的DrawRectangle方法绘制粗边框图形，可以方便的自定义图形的边框大小，如示例截图所示的效果，具体的代码编写方法为： 　　private void button1_Click(object sender, EventArgs e) 　　{ 　　 Graphics graphics = this.CreateGraphics();//声明一个Graphics对象 　　 Pen myPen = new Pen(Color.Black, 8);//实例化Pen类 　　 //调用Graphics对象的DrawRectangle方法 　　 graphics.DrawRectangle(myPen, 10, 10, 150, 100); 　　}

STM32f103C8T6 TIM3 PWM源码 四路PWM输出，亲测可用 编译软件：MDK4.53 硬件平台：STM32开发板（主芯片stm32f103c8t6） 仿真器：JLINK