STM32-H103 board is entry level development board for the new ARM Cortex M3 family of devices produced by ST Microelectronics Inc. With STM32-H103 you can explore the features of STM32 family on budged, the board have everything necessary to bu

这个是我画的USB转RS232串口的原理图PCB -This is my painting USB to RS232 serial PCB schematic