arith

使用PLECS，进行的逆变器的仿真。 里边包含了一个整流器仿真，一个PQ控制仿真，一个VF控制仿真。还有一些验证性的仿真。(A inverter simulation with PLECS tool)

说明：  此原理图是验证过的PCB，波特率在1.2的时候功率20DB 时，空地上，离地面高度为10米左右，测试距离1000米左右(This schematic diagram is a PCB that has been verified. When the baud rate is 1.2, the power is 20dB. On the open ground, the height is about 10m from the ground and the test distance is about 1000m)

使用MDK写的STM32F4的485通信程序，不使用延迟，解决了因485控制端翻转过快而导致的数据发送不完全的情况(The MDK write the STM32F4 in 485 communications program, do not use the delay to resolve the 485 control terminal flip too fast data transmission is not completely)

这是一个基于51单片机的光立方程序，可以实现多种LED显示功能(This is a light cube program based on 51 single chip microcomputer, can realize many kinds of LED display function )

只做了时间显示，和温度显示，使用一个按键切换(Only time display, and temperature display, using a button to switch)

该程序为大家提供按键扫描程序例程。给大家一个参考，来实现简单的按键扫描功能(This program provides you with the routine of key scan program. To give you a reference, to achieve a simple key scan function)

时钟、日期、农历、温度报警、日期节日提醒等12861大液晶显示(Clock temperature of the date of the festival alarm)

this is puzl game first , load a picture, and chose picture

说明：  基于stm32F103C8 与AT24C64实现开机次数记录(Record the number of startup times based on stm32f103c8 and at24c64)

基于51单片机的心电监护仪程序，实现心电的实时监护。(ECG monitor based on 51 MCU.)