摘  要


學(xué)校電鈴定時(shí)控制電路一般由以單片機(jī)為核心設(shè)計(jì)而成，然而由于芯片的集成程度高，對(duì)設(shè)計(jì)者電子技術(shù)、電路基本概念、電參數(shù)測量方法的掌握情況要求不高。為增強(qiáng)根據(jù)實(shí)際需要設(shè)計(jì)電子電路的能力，同時(shí)鍛煉和提高學(xué)生對(duì)相關(guān)知識(shí)的綜合應(yīng)用能力將設(shè)計(jì)電路改為以EPROM為核心的，由顯示電路、打鈴電路、時(shí)鐘電路、調(diào)整電路有機(jī)組成的控制電路來實(shí)現(xiàn)。

本設(shè)計(jì)有以下部分組成：一是有計(jì)數(shù)器、LED顯示和脈沖構(gòu)成的時(shí)鐘顯示電路，實(shí)現(xiàn)時(shí)鐘計(jì)時(shí)與顯示；二是由EPROM和按鍵部分構(gòu)成的定時(shí)控制電路，用以實(shí)現(xiàn)對(duì)多個(gè)校區(qū)不同時(shí)間的定時(shí)和調(diào)整控制。

本設(shè)計(jì)避開單片機(jī)選用其他芯片，由于其他芯片功能上的不足，導(dǎo)致設(shè)計(jì)電路的復(fù)雜，占用空間大，反應(yīng)較慢等不足，但基本上完成了設(shè)計(jì)要求和實(shí)現(xiàn)設(shè)計(jì)目的。加深了對(duì)電子電路的概念、基本原理、設(shè)計(jì)方法的理解與掌握。

關(guān)鍵詞：定時(shí)控制；EPROM電路設(shè)計(jì)；打鈴電路設(shè)計(jì)


 


 


 


 


 


 


 


 


 


 


 




Abstract


Buzzers timing control circuit in school is designed generally based on single-chip, while the integration degree of chip is very high, which does not require designers can master electronic technique, the basic concepts of circuit, and measuring methods of electric parameters very well. In order to enhance the ability of designing circuits according to the realistic needs, to improve students’ comprehensive skills about the related knowledge: convert designed circuit into a control circuit with the core of EEPROM, consisted of display circuit, jow circuit, clock circuit and alignment circuit organically.

This design contains two parts below: 1.a clock display circuit with a counter, a LED display, and a pulse constitute, which will realize clock counter and display. 2.a timing control circuit with EEPROM and keys part, which will realize timer and adjustment control in different campus.

Avoiding of using single-chip, I choose other chips. On functions, other chips are not better enough than single-chip, which result in the complex circuits, large room occupied, and reaction slower etc. However, these chips generally realize the demand of design and destination of experiment and make students enhance the conceptions of circuits, basic principle, and design principle.

Key words: timing control; circuit design of EPROM; design of jow circuit


 


 


 


 


 


 


 

目  錄


緒論•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1

第一章 總體電路設(shè)計(jì)••••••••••••••••••••••••••••••••••••••••••••••••3第二章 定時(shí)調(diào)整控制電路••••••••••••••••••••••••••••••••••••••••••••5

2.1用EEPROM設(shè)計(jì)定時(shí)控制電路的方法•••••••••••••••••••••••••••••••5

2.2用EEPROM設(shè)計(jì)定時(shí)控制電路于設(shè)計(jì)中的應(yīng)用•••••••••••••••••••••••6

第三章時(shí)鐘顯示電路•••••••••••••••••••••••••••••••••••••••••••••••••11

3.1  脈沖發(fā)生器及設(shè)計(jì)思路概述•••••••••••••••••••••••••••••••••••••11

3.2  七段 LED 顯示器與譯碼器概述設(shè)計(jì)思路•••••••••••••R..