⭐ 欢迎来到虫虫下载站！ | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站
📤 上传资源

📄 蜂鸣器原理及应用.htm

📁 此压缩包为AT89C51控制的电子门铃 包括keil文件包 以及PROTEUS的仿真 希望对初学者有所帮助
💻 HTM
📖 第 1 页 / 共 4 页
字号:
🔍
1234 
                        src="蜂鸣器原理及应用.files/fmq4.gif" width=328 border=0></A></TD>
                      <TD vAlign=top width="2%">
                        <DIV align=center>
                        <P>&nbsp;</P></DIV></TD></TR>
                    <TR>
                      <TD vAlign=top>&nbsp;</TD>
                      <TD vAlign=top>
                        <DIV align=center><SPAN class=style128>图 3 
                      </SPAN></DIV></TD>
                      <TD vAlign=top>&nbsp;</TD></TR></TBODY></TABLE>
                  <DIV align=justify><BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>如图所示，蜂鸣器的正极接到VCC（＋5V）电源上面，蜂鸣器的负极接到三极管的发射极E，三极管的基级B经过限流电阻R1后由单片机的P3.7引脚控制，当P3.7输出高电平时，三极管T1截止，没有电流流过线圈，蜂鸣器不发声；当P3.7输出低电平时，三极管导通，这样蜂鸣器的电流形成回路，发出声音。因此，我们可以通过程序控制P3.7脚的电平来使蜂鸣器发出声音和关闭。<BR><BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>程序中改变单片机P3.7引脚输出波形的频率，就可以调整控制蜂鸣器音调，产生各种不同音色、音调的声音。另外，改变P3.7输出电平的高低电平占空比，则可以控制蜂鸣器的声音大小，这些我们都可以通过编程实验来验证。<BR><BR><BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;<SPAN 
                  class=style141>二、蜂鸣器的实验例程</SPAN></SPAN></DIV>
                  <P align=left>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>下面我们通过几个实验例程来学习蜂鸣器的编程使用，通过这些实验，给大家一个更加感性的认识。<BR><BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN><SPAN 
                  class=style161>1、简单的蜂鸣器实验程序：</SPAN>本程序通过在P3.7输出一个音频范围的方波，驱动实验板上的蜂鸣器发出蜂鸣声，其中DELAY延时子程序的作用是使输出的方波频率在人耳朵听觉能力之内的20KHZ以下，如果没有这个延时程序的话，输出的频率将大大超出人耳朵的听觉能力，我们将不能听到声音。更改延时常数，可以改变输出频率，也就可以调整蜂鸣器的音调。大家可以在实验中更改#228为其他值，听听蜂鸣器音调的改变。<BR><BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;&nbsp;ORG &nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>0000H<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;&nbsp;AJMP &nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;MAIN<SPAN 
                  class=style125>&nbsp;</SPAN> <SPAN 
                  class=style125>&nbsp;&nbsp;&nbsp; 
                  </SPAN>;跳转到主程序<BR><BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; ORG&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN> 
                  0030H<BR>MAIN:&nbsp;CPL&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN> P3.7&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN> &nbsp;<SPAN class=style125>&nbsp; 
                  </SPAN>;蜂鸣器驱动电平取反<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;&nbsp;LCALL &nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>DELAY &nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN> 
                  &nbsp;;延时<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;&nbsp;AJMP &nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;MAIN &nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN> &nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>;反复循环<BR><BR>DELAY:MOV &nbsp;<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN>R7,#228&nbsp;<SPAN 
                  class=style125>&nbsp;&nbsp; 
                  </SPAN>;延时子程序，更改该延时常数可以改变蜂鸣器发出的音调<BR>DE1: 
                  &nbsp;DJNZ&nbsp;<SPAN class=style125>&nbsp;</SPAN> 
                  R7,DE1<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;&nbsp;RET<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; END<BR><BR><SPAN 
                  class=style161>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>2、倒车警示音实验程序：</SPAN>我们知道各种卡车、货柜车在倒车时候，会发出倒车的蜂鸣警示提示音，同时警示黄灯也同步闪烁，提醒后面的人或车辆注意。本实验例程就实现倒车警示功能，通过实验板上的蜂鸣器发出警示音，同时通过实验板上P1.2和P1.5上的两个黄色发光二极管来发出黄色警示灯。<BR><BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; ORG&nbsp;<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN> 
                  0000H<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; AJMP&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN> START&nbsp;<SPAN 
                  class=style125>&nbsp;&nbsp;&nbsp;&nbsp; 
                  </SPAN>;跳转到初始化程序<BR><BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; ORG&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>0033H<BR>START:<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; MOV&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>SP,#60H<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN>;SP初始化<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; MOV&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>P3,#0FFH<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;</SPAN>;端口初始化<BR><BR>MAIN: 
                  ACALL&nbsp;<SPAN class=style125>&nbsp;</SPAN>SOUND<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN> 
                  ;蜂鸣器发声<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; ACALL&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>YS500M <SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;</SPAN>;延时<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; AJMP&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;</SPAN>MAIN<BR><BR>SOUND:<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; MOV&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>P1,#11011011B ;点亮2个警示黄色发光二极管 
                  <BR>&nbsp;&nbsp;&nbsp;<SPAN class=style125>&nbsp;</SPAN>&nbsp; 
                  MOV&nbsp;<SPAN class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>R2,#200<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN>;响200个周期<BR>SND1: 
                  CLR&nbsp;<SPAN class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>P3.7<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN> 
                  ;输出低电平T1导通,蜂鸣器响<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; ACALL&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>YS1ms<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;</SPAN> ;延时<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; SETB&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;</SPAN>P3.7<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN> 
                  ;输出高电平T1截止，蜂鸣器不响<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; ACALL&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>YS1ms <SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;</SPAN>;延时<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; DJNZ&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;R2,SND1<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; MOV&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>P1,#0FFH<SPAN 
                  class=style125>&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN>;熄灭黄色警示灯<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; RET<BR><BR>YS1ms: <SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN>;1ms延时子程序 
                  <BR>&nbsp;&nbsp;&nbsp;<SPAN class=style125>&nbsp;</SPAN>&nbsp; 
                  MOV&nbsp;<SPAN class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>R0,#2<BR>YL1: &nbsp;MOV&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>R1,#250<SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN> 
                  ;改变R0的数值可改变声音频率<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; DJNZ&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;R1,$<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; DJNZ&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;R0,YL1<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; RET<BR><BR>YS500M: <SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;&nbsp;</SPAN><SPAN 
                  class=style125>&nbsp;</SPAN> 
                  ;500ms延时子程序<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; MOV&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>R0,#6<BR>YL2: &nbsp;MOV&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>R1,#200<BR>YL3:&nbsp; 
                  MOV&nbsp;<SPAN class=style125>&nbsp;</SPAN>&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>R2,#250<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; DJNZ&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;R2,$<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; DJNZ&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;R1,YL3<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; DJNZ&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp;R0,YL2<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; RET</P>
                  <P align=left>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>&nbsp; END<BR><BR><BR><SPAN 
                  class=style161>&nbsp;&nbsp;&nbsp;<SPAN 
                  class=style125>&nbsp;</SPAN>3、“叮咚”电子门铃实验程序：</SPAN>常见的家用电子门铃在有客人来访时候，如果按压门铃按钮时，室内会发出“叮咚”声音，本实验程序模拟电子门铃的发音，当我们按压实验板上的K1按钮时候，蜂鸣器发出“叮咚”音乐声，是一个比较实用的程序。</P>
                  <TABLE width="100%" align=center border=0>
                    <TBODY>
                    <TR>
                      <TD vAlign=top>
                        <DIV class=style157 align=center>
                        <DIV align=left>&nbsp;&nbsp;&nbsp;<SPAN 
                        class=style125>&nbsp;</SPAN>“叮咚”电子门铃实验ASM源程序：</DIV></DIV></TD>
                      <TD vAlign=top>&nbsp;</TD>
                      <TD vAlign=top>
                        <DIV align=justify><SPAN 
                        class=style135>“叮咚”电子门铃C语言源程序：</SPAN></DIV></TD></TR>
                    <TR>
                      <TD vAlign=top width="51%">&nbsp;&nbsp;&nbsp;<SPAN 
                        class=style125>&nbsp;</SPAN>ORG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<SPAN 
                        class=style125>&nbsp;</SPAN>0000H<BR>&nbsp;&nbsp;&nbsp;<SPAN 
                        class=style125>&nbsp;</SPAN>LJMP&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;START
1234

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -