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《一周搞定模电》-光耦等元器件
2022-06-26 08:49:00 【涛涛呐~】
一、光耦器件
实现一种**“电-光-电”**的转换
下图是TLP521的数据手册中的重要参数:
仿真原理图如下所示:
光耦晶体管注意左边供电电源和右边供电电源需不一致,因为如果电源中有干扰信号,则会达到一种隔离效果。
二、发声器件

图1:喇叭,无极性器件,无源蜂鸣器(内部没有振荡器),所以直流不能驱动,需要2KHz-5KHz的方波才能驱动使其发出声响。
图2:蜂鸣器,有极性,有源蜂鸣器(内部含有震荡器),给予1.5V-15V电压后就会发出声响。
二、继电器
是一种“自动开关”,通过低电压、小电流去控制高电压、大电流。
继电器术语:常开触点和常闭触点
应用:常应用在开关速度要求不高的场合
仿真图如下:
三、数码管
利用拨码开关控制数码管显示数值仿真如下:
四、瞬态电压抑制器(TVS)
是一种二极管形式的高效能保护器件,防止瞬态高能量冲击,保护精密器件免受浪涌脉冲的损坏。
作用:
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