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Question:

I would like to ask, usb data line where the positive and negative? Can you use it as a power source?

I would like to ask, usb data line where the positive and negative? Can you use it as a power source?

Answer:

Do not rely on welding together, by the trouble together
which is black and white red and green is - red is +, do not know why you use 5v power, if the power is small, no problem
You can, USB port up, both sides of the left + right - or you remove the skin,

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