大型搶答器設計

電子機電論文編號:JD614  論文字數:5730,頁數:21

目錄
1引言 1
2電路原理概述 2
2.1原理框圖 2
2.2電路圖 2
3按鍵控制電路 3
3.1獨立式鍵盤及其接口 3
3.2矩陣式鍵盤及其接口 3
4電源電路設計 5
5計數脈沖產生 6
5.1晶體振蕩器 6
6列信號及列顯示譯碼 8
6.1循環計數器 8
6.2列信號的產生 8
6.3列顯示譯碼電路 10
6.4 CD4511工作原理 10
7行信號及行顯示譯碼 12
7.1行信號產生 12
7.2行顯示譯碼電路 12
8七段LED顯示電路 13
8.1顯示電路的設計 13
8.2七段LED顯示器引腳功能 13
9主持人控制電路 14
9.1 RS觸發器 14
9.2主持人按鈕數據取值依據 15
參考文獻 16
致謝 17
附錄 18

摘 要

本文搶答器利用8×10鍵坐標X、Y的不同來確定搶答者的位置，把搶答者位置分為橫坐標和列坐標。當搶答者發出信號時，先確定他的列坐標，對列坐標進行掃描記數，選中的為高電平，其他列為低電平，再經過譯碼器譯碼，最后送到LED中顯示，確定出列坐標位置。然后確定橫坐標位置，同樣選中的為高電平，未選中的為低電平，用譯碼器譯出X再用LED顯示出來，確定出橫坐標位置，則利用（X，Y）可以確定搶答者的位置，最后通過RS觸發器觸發音響控制電路。

關鍵詞：搶答器；譯碼器；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