说明： 此PDF文件为一51串口下载烧录器电路的PCB图,可直接打印于光面纸上用于热转印制作,对于单片机初学者有一定的实用度. (This PDF document is a 51 serial download burner PCB circuit diagram, can be directly printed on glossy paper used to transfer the production of, for Singlechip beginners have a certain degree of utility.)
