This document provides a circuit diagram for a WinPic800 GTP-USB development board. The board uses a PIC18F2550 microcontroller connected to an ICSP header, LEDs, a USB interface, and other components. Power is supplied either from the USB port or an external source like a battery via a transistor. The schematic shows the pin connections of the microcontroller and other ICs along with the component designators and values.