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led贴片怎样测量好坏
更新时间: 2020-09-20 00:00:00  

用万用表的二级管档测,黑表笔接负极、红表笔接正极,如果有蜂呜声说明led贴片是坏的,如果灯亮则是好的.。贴片LED也叫做SMD LED,它的发光原理就是将电流通过化合物半导体,通过电子与空穴的结合,过剩的能量将以光的形式释出,达到发光的效果。

关键词: led 贴片 怎样 测量 好坏

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