C语言写的一个DS1302实时时钟程序，这个很多时候应用在视频叠加系统。-C language written by a real-time clock procedures DS1302, often used in video overlay system.

航模航拍视频OSD叠加的全部制作资料，航拍爱好者可以自己动手制作。-All production data model aircraft aerial video OSD overlay, aerial enthusiasts can do it yourself.