利用STC89C52制作一个万年历,文件包含原理图(Cadence-Allegro),PCB示意图及整个源程序,经调试可用,希望对于编程初学者有帮助.-use STC89C52 produced a calendar, document contains drawings (Cadence - Allegro), and the entire PCB schematic source files, The tests can be used, hope for the program is to

基于51单片机的十字路口交通灯设计，有keil工程文件，proteus仿真，c语言程序，原理图及pcb图纸。-Based on 51 single-chip crossroads traffic lights design, keil project files, proteus simulation, c language program, schematics and pcb drawings.