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/JkiuL.jpg)
ground - Wiring a Micro-USB cable that doesn't have a black GND and has 3 unshielded wires? - Electrical Engineering Stack Exchange
![USB 2.0 Cable - A-Male to B-Male for Development board (Specific Models Only) - 6 FT/2 PACK/IVORY - Walmart.com USB 2.0 Cable - A-Male to B-Male for Development board (Specific Models Only) - 6 FT/2 PACK/IVORY - Walmart.com](https://i5.walmartimages.com/asr/c46785ca-0bd1-4229-b7b6-a171b19f14cc_1.a743d21795196a4218bd817794c19437.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
USB 2.0 Cable - A-Male to B-Male for Development board (Specific Models Only) - 6 FT/2 PACK/IVORY - Walmart.com
![Amazon.com: XMSJSIY USB 2.0 Male 5 Pin to Bare Wire Pigtail Open End Cables 5 Cores USB A 5V 5A Power Charge 480 Mbps Quick Charge Data Transmission Wires DIY Connector Replacement Amazon.com: XMSJSIY USB 2.0 Male 5 Pin to Bare Wire Pigtail Open End Cables 5 Cores USB A 5V 5A Power Charge 480 Mbps Quick Charge Data Transmission Wires DIY Connector Replacement](https://m.media-amazon.com/images/I/61M-WARbu8L.jpg)