quite a some time ago i worked on this little pcb for PIC18F14K50 microcontroller , the good thing about this microcontroller is that it has USB capability so i did this tiny pcb to utilize USB. the board made out of two kid of separate sections as shown in the 3D rending blow, you can use this board a proper USB to RS232 converter or cut through the black line and it become simple USB I/O board.
www.github.com/circuitvalley
