I used Kicad to draw up a preliminary schematic for the interface board. When I started work on the PCB layout I soon realized my original thought to use a 1" x 0.5" board was unrealistic. I am now working with a PCB board that will be the same size as the GPS receiver module (1.4" x 1"). The larger sized board has the room needed for all the parts but it is still going to be a challenge to run all the traces. I've already made some adjustments to the schematic to accommodate the initial work on the PCB layout.

It was not unexpected that the schematic diagram, the PCB, and the final packaging for the project are interrelated. Changes in one of these areas can impact the other areas. As I started the board layout I had to back port some changes to the schematic diagram. I have an idea on the final packaging for the project. The placement of the USB connectors, switch, button, and LED in the project enclosure will impact the PCB layout and that may require additional minor changes to the schematic to keep everything in sync.

The completion of the PCB layout is currently held as I have not made a final selection of the USB connectors I will use. I also need to do some 3D modelling to check clearances between the project enclosure and the cameras built-in flash unit when the flash unit is in use. The 3D model may reveal the need for additional changes in parts placement on the PCB.