This is a very simple way to change the standart USB to USB OTG. The Mini or Micro USB to USB does not work if you want to use it for OTG, because 4. pin micro USB plug is not plugged. Connect as shown above.
This really a work that so cool if you like modif PC. So this is a USB interface for alphanumeric LCD display like 4 × 20 which can be controlled with LCD Smartie program. USB interface is implemented by using PIC18F2550 microcontroller, Using USB LCD modules. Below is a project of the USB LCD controller. Schematic circuit and PCB design source | link
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