The board contains minimum amount of elements only to get 2 uart ports running. The only signals connected are TX, RX and GND as the other old pins are never used these days anyways. This project is a great deal if one application uses more than 1 serial port (For example traces and bootloader).
Many different cables can be made for this board depending on the application, for example a standard DB9 male one.
In the future I am considering trimming it a bit:
- Getting rid of the USB A plug and create a USB plug shaped from PCB instead. That would also allow me to drop protection resistor and capacitor.
- Making the board more narrow and placing components on both side of the PCB.
The PCB is easily placable in a thermo-tube so no need for the casing.
2 boards were already soldered and tested. They work without any problems.