大型抢答器设计

论文编号:JD614  论文字数:5730,页数:21

摘 要

本文抢答器利用8×10键坐标X、Y的不同来确定抢答者的位置，把抢答者位置分为横坐标和列坐标。当抢答者发出信号时，先确定他的列坐标，对列坐标进行扫描记数，选中的为高电平，其他列为低电平，再经过译码器译码，最后送到LED中显示，确定出列坐标位置。然后确定横坐标位置，同样选中的为高电平，未选中的为低电平，用译码器译出X再用LED显示出来，确定出横坐标位置，则利用（X，Y）可以确定抢答者的位置，最后通过RS触发器触发音响控制电路。

关键词：抢答器；译码器；大容量

Abstract

Competition answer Machine in this paper use 8×10 keys and their X,Y data to confirm the respondents’ location which express as different X-coordinate and Y-coordinate. When the respondent sends out signal, first confirm its Y-coordinate, then scan and make notes. The signal which is pitched on ranks high-level inverter, and others low-level inverter. After coding by encoder, the signal finally shows the Y data in LED. Subsequently, confirm the X-coordinate and dispose it, using the same method as Y-coordinate. And then, it can ensure the respondents’ location according to the (X,Y) which just got, spring the sound controller through RS trigger lastly.

Key word: competition answer machine; encoder; high-capacity

目录
1引言 1
2电路原理概述 2
2.1原理框图 2
2.2电路图 2
3按键控制电路 3
3.1独立式键盘及其接口 3
3.2矩阵式键盘及其接口 3
4电源电路设计 5
5计数脉冲产生 6
5.1晶体振荡器 6
6列信号及列显示译码 8
6.1循环计数器 8
6.2列信号的产生 8
6.3列显示译码电路 10
6.4 CD4511工作原理 10
7行信号及行显示译码 12
7.1行信号产生 12
7.2行显示译码电路 12
8七段LED显示电路 13
8.1显示电路的设计 13
8.2七段LED显示器引脚功能 13
9主持人控制电路 14
9.1 RS触发器 14
9.2主持人按钮数据取值依据 15
参考文献 16
致谢 17
附录 18

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