摘要：随着微电子技术、无线技术发展以及人们生活水平的大幅度提高，人们对智能化家居的要求越来越高，因此无线音乐门铃系统的设计成为本课题研究的目标。本文主要阐述了基于单片机的无线音乐门铃的设计。采用无线设计，门铃可以有一个发射端，多个接收端。不仅可以在门附近放置接收端，还可以在距离门较远的房间内放置接收端，这样门铃被按下时就可以及时听到门铃声。同时考虑到用户的个性化需求，在门铃内置了几首不同的音乐，让用户根据自己的喜好选择门铃的音乐。主机上也有关闭音乐的按键，在门铃响起时，用户可以不必等待音乐播放结束就暂停音乐，这样来访者也可以意识到主人在家。该门铃电路结构简单、程序调试方便、方便安装和使用，有一定的实用价值。90924

毕业论文关键词:AT89C51，DF无线发送，无线接收

Abstract: With the development of microelectronics technology, wireless technology and the increase of people's living standard,People have more and more requirement to intelligent household。therefore,the design of wireless electronic music doorbell system becomes the goal of this research。This article mainly expounds the design of wireless music doorbell based on single chip。Adopted wireless design,the bell can have one transmitter  and  multiple receivers。The receiver can not only be placed near the door,bus also in the room that far from the door,so when the doorbell is pressed,we can timely heard the doorbell。At the same time,considering the user's inpidualized requirements,we inbuilt a few different music in the doorbell to let the users choose according to his interests。There is also a key to close music in host。When the doorbell is ringing，the user can stop the music without waiting for the end of themusic so that visitors can also aware that there is someone in the house。This doorbell has a simple circuit structure and a convenient debugging program。it is convenient to install and use which has some practical value。源G于J优L尔V论N文M网WwW.youeRw.com 原文+QQ75201`8766

Key words：AT89C51,DF wireless sending ,super-regenerative wireless receiver

目 录

1 绪论 3

1。1 门铃的现状 3

1。2 选题的目的和意义 3

2 系统设计方案 4

2。1 主控芯片选择方案 4

2。2 无线通信选择方案 4

2。3 接收电路选择方案 4

2。4 总体方案概述 5

3 硬件设计 5

3。1 系统总体框图 5

3。2 编码电路 5

3。3 DF发射电路 7

3。4 单片机最小系统 7

3。5 无线接收电路 8

3。6 解码电路 9

3。7