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How can I detect current direction?

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发表于: 19-07-2022 11:55:07
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I'm trying to read how much current an HDMI Hybrid Fiber cable is using.

I'm using an HDMI power injector that injectors +5V power from a USB power into the HDMI connector.  However, when I plug the power injector into the CT-3 (female USB port), the CT-3 turns on.  Why is it backfeeding power from the device (HDMI power injector) and can I disable this?
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