用C语言编写的多功能数字电子称，在C51单片机开发工具Keil软件上运行，效果很好-Multifunction digital electronic scales, written in C language to run on C51 microcontroller Keil software development tools, a good effect

GPS高程拟合，包括源代码，界面，请认真书写上传资料-GPS Elevation Fitting

密码锁，实行简单的密码设置和报警功能，并支持密码的修改-Locks, has a simple password settings and alarm functions, and supports password changes