单片机实验板完整资料（PCB），包括PCB原理图、单片机技术基础教程与实践书的实验电路板、STC89C51安装图、89S51实验板的一些说明。介绍详细，适合初学者。-Complete information Microcontroller Experiment board (PCB), including the PCB schematics, single-chip microcomputer-based tutorial and practice test book, circuit boa