基于单片机的八路抢答器设计

文档编号:JD840  文档字数:6592,页数:23

八路抢答器设计与实现

摘要：设计一个实现抢答功能的电路，能够显示最先抢答到的号数，并能实现倒计时和时间不够时的报警功能。此抢答器电路设计原理简单、功耗低、稳定性好、反应速度快和安装方便。此抢答器所需的硬件只是一块AT89C51芯片、数码管和按键等，成本比较低，适用于许多场合。
关键词：抢答器；AT89C51；程序控制

The Design and Realization of Eight-way Answering Device

Abstract: This provides an approach to design a circuit which owns the function of answering questions actively, displaying the number of the person who answers firstly and being able to countdown and alarm when the time for answering questions is almost up . This design of this circuit is very simple and consumes little power.But yet,it is very stable, responses quikly and an be installed easily. The design need are only a piece of AT89C51 chips, digital tabes buttons and so on,which cost very little and can be applied in many circumstances.
Keywords: Answer devices; AT89C51; Procedures control

目录
摘   要 I
Abstract I
1  引言 1
2 原理设计 1
3 硬件电路 1
3.1  AT89C51介绍 1
3.1.1 AT89C51主要特性 1
3.1.2管脚说明 2
3.1.3芯片擦除： 4
3.2  单片机最小应用系统 4
3.3  报警电路 4
3.4  显示电路 5
3.4.1 选择显示器件 5
3.4.2 显示原理介绍 5
3.4.3 LED显示与单片机连接图 6
3.5  总体电路 6
4   软件设计 8
5   结束语 9
参考文献 10
谢   辞 11
附录  八路抢答器程序 12

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