My USB cable has 4 colours, red, blue, brown, and yellow. What are the positive and negative? - Quora
My USB cable has 4 colours, red, blue, brown, and yellow. What are the positive and negative? - Quora
![ground - Wiring a Micro-USB cable that doesn't have a black GND and has 3 unshielded wires? - Electrical Engineering Stack Exchange ground - Wiring a Micro-USB cable that doesn't have a black GND and has 3 unshielded wires? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/CGYo7.jpg)
ground - Wiring a Micro-USB cable that doesn't have a black GND and has 3 unshielded wires? - Electrical Engineering Stack Exchange
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