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不用变压器也能把220V交流电变为5V直流电？

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工科男孙老师 频道迁移中

没事拆了一个小夜灯发现里面的供电方式蛮有意思的不需要变压器就可以把220V交流转为3.3V直流。

posted by phyrebrightx3


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