多路抢答器.doc

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 plete the task, to avoid people's 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 ponents, 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 contestant's Numbers and vies to answer first time characteristics, and reset circuit, make its can start a new round of the answer petition
【 key words 】: the buzzer, digital tube, alarm.
目录
摘要 I
ABSTRACT II
1
: 多路抢答器 1
1
2. 设计方案选择和论证 2
2
2
3
4
元件简介 4
6
10
12
5. 实物电路调试及结果分析 13
小结 15
致谢 16
参考文献 17
附录:元件清单 18
设计任务描述
: 多路抢答器

掌握抢答器的工作原理及其设计方法。

(1)设计一个智力竞赛抢答器,可同时供8名选手或8个代表队参加比赛,他们的编号分别是0、1、2、3、4、5、6、7,各用一个抢答按钮,按钮的编号和选手的编号相对应,分别是S0-S7。
(2)给节目主持人设计一个开关,用来控制系统的清零(编号显示数码管灭灯)和抢答的开始。
(3)抢答器具有数据锁存和显示的功能。抢答开始后,若有选手按动抢答按钮,编号立即锁存,并在LED数码管行显示出选手的编号,同时扬声器给出音响提示。此外,要封存输入电路,禁止其他选手抢答。优先抢答选手的编号一致保持到主持人将系统清零为止
(4)抢答器具有定时抢答的功能,且一次抢答的时间可以由主持人设定(如30S)。当节目主持人启动“开始”键后,要