quanqiao-dcdc_uc3875

测量单片机频率，可以测量周期波的频率，最大可以测到60khz(Measuring Frequency of Single Chip Microcomputer)

风电场的详细模型，风电并网的仿真以及控制仿真(Detailed model of a wind farm wind power grid simulation and control simulation)

本程序用于复合材料里面计算等效弹性模量，采用的是渐近均匀化的方法(calculation of equivalent elastic modulus with homogenization Method)

PSCAD differential relay simulation, can be used for educational and for real substation simulation

中颖51单片机EEPROM读写完整程序（已调试） (Ying, 51 single-chip EEPROM read and write the complete program (debug))

步进电机28BYJ48型四相八拍电机，电压为DC5V—DC12V。当对步进电机施加一系列连续不断的控制脉冲时，它可以连续不断地转动。每一个脉冲信号对应步进电机的某一相或两相绕组的通电状态改变一次，也就对应转子转过一定的角度（一个步距角）。当通电状态的改变完成一个循环时，转子转过一个齿距。四相步进电机可以在不同的通电方式下运行，常见的通电方式有单（单相绕组通电）四拍（A-B-C-D-A。。。），双（双相绕组通电）四拍（AB-BC-CD-DA-AB-。。。），八拍（A-AB-B-BC-C-CD-D-DA-A。。。）(Stepping Motor 28BYJ48 four-phase eight-phase motor, the voltage DC5V-DC12V. When a series of continuous control pulses are applied to the stepper motor, it can be continuously rotated. Each pulse signal corresponds to the stepper motor of a phase or two-phase winding power state change once, also corresponds to the rotor through a certain angle (a step angle). When the change in the power-on state completes one cycle, the rotor turns one pitch. Four-phase stepper motors can be operated in different power-up modes. The common power-up modes are: single-phase winding power (ABCDA ...), double (dual-phase winding)-DA-AB-...), eight beats (A-AB-B-BC-C-CD-)

说明：  基于stm32开发的频率检测及液晶显示，在显示时的测量范围为50hz到100khz。误差为

使用STM32F103C8T6作为主控的ST-Link固件(ST-Link firmware using STM32F103C8T6 as master control)

单片机实验中的键盘扫描实验，用lcd1602液晶显示屏显示按键值，c语言编写(for 51)

简单的音乐盒，可以播放音乐，并且有花样灯进行闪烁，是个不错的小礼物。(music box )