第1页共16页编号:时间:2021年x月x日书山有路勤为径,学海无涯苦作舟页码:第1页共16页声光显示智力竞赛抢答器目录第1章绪论··················································································21.1前言······················································································31.2单片机的基础知识···································································41.2.1单片机的介绍·····································································41.2.2单片机的历史·····································································51.2.3单片机的应用领域·······························································61.2.4单片机的种类·····································································7第2章设计步骤···········································································82.1设计要求···············································································82.2抢答器的硬件系统设计·····························································82.2.1系统整体方案设计····························································82.2.2系统硬件组成··································································92.3抢答器的软件系统设计······························································92.3.1数码显示软件设计····························································92.3.2音频输出软件设计····························································2.4.抢答器的电路原理图设计·······················································2.4.1电源电路设计··································································2.4.2复位电路设计··································································2.4.3时钟电路设计··································································2.4.4输入模块电路设计····························································2.4.5显示模块电路设计···························································...