Test_ifnonnull

用松翰单片机写的一个热水器程序，带数码管，全套，PCB。(Sonix MCU write a water heater program, with digital control, a full set of the PCB.)

赛维网络硬件资讯新闻系统 前台用户：test test 后台管理：admin admin(LDK News Network Hardware Information System Reception User: test test Admin: admin admin)

飞思卡尔dz60读写SD卡，在12864显示屏显示图片程序(freescale dz60 write/read SD card and show pictures on12864 LCD)

超声波测距模块扩展实验，使用超声波传感器，把数据结果显示在1602上。(Ultrasonic Ranging Module extension experiments using ultrasonic sensors, and display data results in 1602.)

50hz陷波器设计代码,FFR陷波器设计，绝对的好东西啊！！！(50hz notch filter design code FFR notch filter design, absolutely a good thing! ! !)

SIM800C升级工具,二次开发工具，省成本的特别好用用的方案(SIM800C upgrade tool)

网上有许多关于DM9000网卡芯片的介绍，然而这些介绍大多是关于Linux或WinCE下的驱动程序或移植，很少有介绍单片机驱动DM9000的例子。本文详细介绍了调试DM9000E的过程，仅供参考。(There are many online card chip on the DM9000 introduction, however, most of these presentations are on Linux or WinCE driver or under the transplantation, very few examples of introduced Microprocessor DM9000. This paper describes the process of debugging DM9000E for reference purposes only.)

单片机时钟编程，包括秒表，时钟以及闹钟，亲测可用，包括DSN文件(Microcontroller clock programming, including a stopwatch, clock, and alarm clock, pro-test are available, including DSN file)

这个一个关于储能电池充放的仿真，电路采用了DC_DC变换控制。(The storage battery charge and discharge about simulation, the circuit uses DC_DC conversion control)

凌阳无线充电方案（QI）原理图，GPMQXXXA芯片方案。(Sunplus wireless charging program (QI) schematics, GPMQXXXA chip solutions.)