多路抢答器教程.doc

沈阳工程学院课程设计（论文） 多路抢答器的设计 -  PAGE 16 - -  PAGE 17 - 摘 要 新时代，生活娱乐的多元化已是现代的生活形式之一。知识、娱乐比赛更是流行于各行各业， 而其中又以抢答形式为主。 在抢答过程中，为了知道哪一组或哪一位选手抢先获得抢答权，必须要设计一个系统来完成这个任务，避免人的主观意识判断。在抢答中，只靠视觉是很难判断出哪组先答题。此次设计使用74LS148D、555定时器、74LS48D、74LS192、74LS279、74LS160等为核心控制元件,设计一个简易的抢答器，与数码管、报警器等构成八路抢答器，利用了抢答器电路、倒计时电路、报警电路。设计的抢答器具有实时显示抢答选手的号码和抢答时间的特点，而复位电路，则使其能再开始新的一轮答题和比赛。 【关键词】：抢答器、数码管、报警器 ABSTRACT The diversity of new era, the life entertainment is one of the modern form of life. Knowledge, entertainment, gamesIs more popular in all walks of life, and which is given priority to with vies to answer first the form again. In the process of vies to answer first, in order to know which group or which one player first to get the vies to answer first, must design a system to complete the task, to avoid peoples subjective consciousness. In vies to answer first, only the vision is difficult to determine which group to answer first. This design USES 74 ls148d, 555 timer, 74 ls48d, 74 ls192, 74 ls279, 74 ls160, etc as the core control components, design a simple responder, and constitute eight-way digital tube, alarm buzzer, using the buzzer circuit, the countdown circuit, alarm circuit. Vies to answer first the design of instruments with real-time display of vies to answer first contestants Numbers and vies to answer first time characteristics, and reset circuit, make its can start a new round of the answer and competition 【 key words 】 : the buzzer, digital tube, alarm. 目 录  TOC \o 1-3 \h \z \u  HYPERLINK \l _Toc470209337 摘 要  PAGEREF _Toc470209337 \h I  HYPERLINK \l _Toc470209338 ABSTRACT  PAGEREF _Toc470209338 \h II  HYPERLINK \l _Toc470209339 1.设计任务描述  PAGEREF _Toc470209339 \h 1  HYPERLINK \l _Toc470209340 1.1设计题目: 多路抢答器  PAGEREF _Toc470209340 \h 1  HYPERLINK \l _Toc470209341 1.2设计要求  PAGEREF _Toc470209341 \h 1  HYPERLINK \l _Toc470209342 2. 设计方案选择和论证  PAGEREF _Toc470209342 \h 2  HYPERLINK \l _Toc470209343 2.1设计思路  PAGEREF _Toc470209343 \h 2