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21ic
26 天
交了智商税:SOT23 220V转换5V电源芯片
将测试电路板放在测试磁柱上,给它输入端口施加工作电压,测量对应的输出电压。由于不太熟悉它的工作特性,所以,在一开始输入工作电压为 12V。 首先测量输入电压,为12V。然后测量他的输出管脚,为11.352V,似乎,输入和输出之间是一个 二极管管压降 ...
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