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光耦+电阻可以检测交流电吗?
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光耦+电阻可以检测交流电吗? - V2EX
4 条回复 • 2022-02-21 16:32:19 +08:00
kings0527 11 小时 35 分钟前
啥光耦。。线圈加 led 淘宝五块钱电路检测
没电阻啥事
整个原理就是电感
没电阻啥事
整个原理就是电感
jimmy980352 11 小时 3 分钟前
简单检测有没有通电肯定是可以的,应该还要加个二极管去掉交流电的负半周
masterclock 10 小时 58 分钟前
电流互感器就可以了
HankAviator 10 小时 33 分钟前 via Android
淘宝有现成的 墙体检测仪
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