八路抢答器设计报告.docVIP

八路竞赛抢答器设计报告 目录 一、设计任务和要求................................................................................................2 二、设计的方案的选择与论证................................................................................3 2.1系统设计思路....................................................................................................3 2.2系统设计的原理框图........................................................................................3 2.3设计方案的可行性论证....................................................................................4 三、主要器件介绍....................................................................................................5 3.1 555定时器.........................................................................................................5 3.2 主要芯片介绍...................................................................................................6 四、单元电路设计、分析与仿真..............................................................................8 4.1抢答判别和显示电路........................................................................................8 4.2 定时抢答与六路彩灯循环电路.....................................................................10 4.3报警电路..........................................................................................................11 4.4 加减计分电路.................................................................................................12 4.5时序控制电路..................................................................................................13 五、设计心得.........................................................................................................15 六、附录................................................................................................................16 元器件明细表........................................................................................................16 七、参考文献.........................................................................................................17 一、设计任务和要求 1.1 设计目的 （1）掌握抢答器电路的原理。 （2）了解数字集成电路的使用方法。