單片機有源蜂鳴器試驗程序（帶電路圖）

ID:321301 · 發表于 2019-2-23 00:26

今天給大家帶來的是入門教程：利用stc89c52驅動有源蜂鳴器不同頻率發聲

蜂鳴器是一種一體化結構的電子訊響器，采用直流電壓供電，廣泛應用于計算機、打印機、復印機、報警器、電子玩具、汽車電子設備、電話機、定時器等電子產品中作發聲器件。蜂鳴器主要分為壓電式蜂鳴器和電磁式蜂鳴器兩種類型。蜂鳴器在電路中用字母“H”或“HA”（舊標準用“FM”、“ZZG”、“LB”、“JD”等）表示。結構原理蜂鳴器
1．電壓式蜂鳴器壓電式蜂鳴器主要由多諧振蕩器、壓電蜂鳴片、阻抗匹配器及共鳴箱、外殼等組成。有的壓電式蜂鳴器外殼上還裝有發光二極管。
多諧振蕩器由晶體管或集成電路構成。當接通電源后（1.5~15V直流工作電壓）,多諧振蕩器起振,輸出1.5~2.5kHZ的音頻信號，阻抗匹配器推動壓電蜂鳴片發聲

壓電蜂鳴片 [1] 由鋯鈦酸鉛或鈮鎂酸鉛壓電陶瓷材料制成。在陶瓷片的兩面鍍上銀電極，經極化和老化處理后，再與黃銅片或不銹鋼片粘在一起。
2．電磁式蜂鳴器電磁式蜂鳴器由振蕩器、電磁線圈、磁鐵、振動膜片及外殼等組成。
接通電源后，振蕩器產生的音頻信號電流通過電磁線圈，使電磁線圈產生磁場。振動膜片在電磁線圈和磁鐵的相互作用下，周期性地振動發聲

電路原理圖如下：

單片機源程序如下:

#include<reg52.h>
#define on 0
#define off 1
sbit fm = P2^3;
void delay(unsigned int xms)
{
unsigned int i,j;
for(i=xms;i>0;i--) //i=xms????xms??
for(j=112;j>0;j--);
}
void main()
{
while(1)
{
//第一段漸變式鳴笛 20毫秒→200毫秒→500毫秒→1秒→500毫秒→200毫秒→20毫秒→
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = on;
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = on;
fm = off;
delay(1000);
fm = on;
delay(1000);
fm = off;
delay(1000);
fm = off;
delay(1000);
fm = on;
delay(1000);
fm = off;
delay(1000);
fm = off;
delay(1000);
fm = on;
delay(1000);
fm = off;
delay(1000);
fm = off;
delay(1000);
fm = on;
delay(1000);
fm = off;
delay(1000);
fm = off;
delay(1000);
fm = on;
delay(1000);
fm = off;
delay(1000);
fm = on;
delay(1000);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(500);
fm = on;
delay(500);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(200);
fm = on;
delay(200);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
fm = off;
delay(20);
fm = on;
delay(20);
}
}

復制代碼

所有資料51hei提供下載:

不同頻率的蜂鳴器實驗.zip (65.63 KB, 下載次數: 27)

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單片機有源蜂鳴器試驗程序（帶電路圖）

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