电子钟设计报告，包含有pcb图以及源程序，相信对大家一定会有帮助的 -E-bell design report, plans and pcb contains the source code, I believe it will benefit everyone

八路数据采集系统 的代码以及做好了的protel的详细的图，完全可用-Octal Data Acquisition System of protel code and do the detailed maps, completely free! ! !