文档介绍：I 摘要在现如今快节奏的生活中,人们对于时间的要求越来越苛刻,很多时候都需要对时间进行规划,然后到时间点就要有时间提醒,这就必须用到时钟提醒装置,亦可称为打铃装置。打铃装置有很多种,比如手机的打铃系统,闹钟的机械打铃装置,广播打铃系统等等,但是日常生活中见得最多的还是校园的自动打铃系统。在学校生活中,每天上下课都离不开打铃系统的使用。打铃器可以为上下课的学生和老师们提供时间提醒,有利于师生对上课和学****的合理安排,同时,也可作为一个提醒学生们作息时间的时间表, 让老师和学生都能有一个规律和科学的时间安排。因此,打铃系统的核心部分也是时钟部分,为系统提供时间基准。本设计主要是针对适用于校园打铃系统要求的,其介绍了一种基于单片机的自动打铃系统的设计方法,系统以 AT89S51 单片机为控制器,以 DS1307 时钟芯片为系统提供时间,并在液晶显示器上显示,通过按键可以设定定时打铃时间和打铃的时间间隔。系统软件设计采用 C语言来完成, C语言语法简洁,使用方便,用于完成软件设计非常方便。本文提出的设计方法电路简单、成本低廉、实用性强。关键字: 打铃器、 AT89S51 单片机、 DS1307 、液晶显示器 II Abstract Now fast-paced life, the time more and more demanding, often need time to plan and then to the point in time there should be reminded, which must be used to clock reminder can also be calledrang the bell device. Rang the bell device are many, such as the phone rang the bell system, mechanical bell device of the alarm clock, radio bell systems, etc., but in daily life appear or campus automatic bell system. In school life, the last class of the day are inseparable from the bell system. The bell can provide time for the last class of students and teachers to remind conducive toa reasonable arrangement of the teachers and students to school and learning, but also asa reminder of the schedule of the students schedule, so that teachers and students cana law and scientific timing. Therefore, the core part is the clock part of the bell system, the system provides a time reference. This design is mainly for the applicable requirements of the campus bell system , introduced a microcontroller-based automatic bell system design method, the system controller is AT89S51 SCM , the DS1307 clock chip provide the system with time, and the LCD displayed on the monitor button can set the time interval of the timer rang the bell time and rang the bell. System software design using C language, C language syntax is simple, easy to use, very convenient tobe used plete the software design. This paper presents the design circuit is simple, low cost, and practical. Key words : Rang