USB pinout, wiring and how it works! USB A, B 2.0 and 3.0 Cable Pinout. The USB cable provides four pathways- two power conductors and two twisted signal conductors. The USB device that uses full speed bandwidth devices must have a twisted pair D+ and D- conductors. The data is transferred through the D+ and D- connectors while Vbus and Gnd connectors provide power to the USB device. USB cable wiring pinout diagram @ pinoutguide Pinout of USB cable schematic and layout of 4 pin USB A / USB B / mini-USB jack connector and 4 pin USB A or USB B plug connectorVery simple. Maximum length of cable is about 5 m for AWG20 and 0.8 m for AWG28 cable.4.5/5(64) USB Mobile Charger Circuit Diagram - Engineers Garage For making this mobile charger circuit, a USB cable is used with at least one male plug on it and strip back about 5 cm of the outer insulation with shield from the bare end of the USB cable. Normally, USB cables have four wires i.e. red, green, white and black. As green and white carry the data so they can be trimmed as they have no use here. How to Make USB OTG Cable: 5 Steps (with Pictures) How to Make USB OTG Cable: Did you forgot to put an important file on your USB key or you want to type faster on your smart phone? If your one of those watch this tutorial where I build nice and compact USB OTG 'On-The-Go' cable from an old Usb connectorso: