密码锁课程设计报告

江苏师范大学科文学院本科生课程设计

课程名称：数字电子技术基础

题目：数字密码锁

专业班级： 14电信2班

***名：**

学生学号： *********

日期： 2016年6月25日

***师：***

指导教师签字：

年月日

目录

摘要...................................................................................................II Abstract................................................................................................ II 1 绪论.. (1)

1.1 背景 (1)

1.2 目的 (1)

2 设计方案简述 (1)

2.1 设计任务 (1)

2.2 设计原件需求 (2)

3 详细设计 (2)

3.1 设计原理图 (2)

3.2 密码验证模块 (3)

3.3 计时模块 (4)

3.4 锁定输出 (5)

3.5 逻辑组合 (6)

4 设计结果及分析 (7)

4.1 总电路图 (7)

4.2 问题解决与分析 (7)

4.3 测试数据 (9)

5总结 (10)

参考文献 (11)

摘要

在日常的生活和工作中, 住宅与部门的安全防范、单位的文件档案、财务报表以及一些个人资料的保存多以加锁的办法来解决。若使用传统的机械式钥匙开锁，人们常需携带多把钥匙, 使用极不方便, 且钥匙丢失后安全性即大打折扣。在安全技术防范领域，具有防盗报警功能的电子密码锁逐渐代替了传统的机械式密码锁，电子密码锁具有安全性高、成本低、功耗低、易操作等优点,受到广大用户的欢迎。本次课程设计简述数字密码锁的设计、制作过程，用74LS138为3线-8线译码器、555为计时模块、D触发器74LS175为锁定输出、74LS00为逻辑组合模块构成该数字密码锁的设计思想和实现过程。该课程设计可以预先设定密码和修改密码等方便操作处理，通过发光二级管颜色的转变辨别密码的正确和密码锁的开启。通过该课程设计，主要解决与我们平常生活关系密切的密码锁的问题，且制作该设计所需要元器件的成本较低，适合学生对数字电路的实践所用。

关键词：数字密码锁；74LS138；555；74LS175；74LS00

Abstract

In daily life and work, security, residential units and departments of the documents, financial statements, and some personal information in order to save more than locking solutions. If the use of traditional mechanical key to unlock, people often need to carry multiple keys, a very inconvenient to use, and after the loss of key security that is greatly reduced. In the field of security and protection, anti-theft alarm function electronic combination lock gradually replace the traditional mechanical combination lock, electronic lock has the advantages of high safety, low cost, low power consumption, easy to operate, welcomed by the majority of users. The curriculum design of digital code lock design, process, using 74LS138 for 3 -8 decoder, 555 for the timing module, D triggers 74LS175 lock output, 74LS00 logic combination module design idea of the digital password lock and implementation process. The curriculum design can be pre-set password and modify passwords and other convenient operation, opening by discerning the password change light emitting two tubes of color and correct password lock. Through the curriculum design, mainly to solve the daily life with our close locks, and making the design required components with low cost, suitable for students to use the practice of digital circuit.

Key words: the digital combination lock; 74 ls138; 555; 74 ls175; 74 ls00