How to Make USB OTG Cable : 5 Steps (with Pictures - A lot of people wonder why have micro USB 5 pins instead of 4. Actually the extra pin or pin 4 is typically not connected in the normal USB cable but If it is connected to ground pin the phone will turn in a host mode and will be able to read USB keys, webcams, mice and keyboards. USB pinout diagram @ pinouts Pinout of USB and layout of 4 pin USB A or USB B plug connector and 4 pin USB A / USB B / mini-USB jack connectorUSB (Universal Serial Bus) designed to connect peripherals such as mice, keyboards, scanners, digital cameras, printers, hard disks, and networking components to PC. It has become the standard connection method for wide variety of devices.
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