Well, everything's here, time to check fitting. Thanks to the KiCAD Stepz export plugin this hasn't been too much of a worry. The basic idea for the design here is just to get everything together into one case, here's what I came up with:
The top of the shell is held together with 4 #6 screws and the strap wraps through the slot on the left. Overall this design is slightly larger than expected but there's a lot that I can (and will) cut out of it to reduce the size. For now it works.
With all that said the boards and stencil have finally arrived, they're looking alright:
It's not exactly visible here but the soldermask pullback on the QFN packages is less than ideal, I'm worried about the overall difficulty I may encounter attempting to reflow these boards. However, every other visual inspection of these boards is positive. the overall fit is perfect in the case along with the battery:
And finally with the top part and screen:
I still need to determine where to add the holes for the buttons, but overall this gets the job done for what I needed. At the moment my only complaint is that the watch is taller than it should be but I guess there's just some work that needs to be done there.
So far I'm very happy with how this project has been progressing. I plan to use this version of the watch for a decent amount of time to determine what improvements need to be made to the hardware. The final version will be more-or-less the same form factor shown here. Ideally the final version does away with the buttons and opts for a 2.2" touch screen panel, but I'll talk more about future plans for this project as soon as this phase is complete.
next up is assembly.