The additional castellated vias on Evo M51 are a big benefit to the this board footprint, significantly expanding the I/O capabilities of the board.  However, for the purposes of prototyping and early product design, they can admittedly be a bit challenging to work with.

For that reason, we are preparing to offer EvoTray – a simple breakout board for Evo M51.

The first PCB protos have arrived, and here’s a quick picture of one from the lab bench:

EvoTray PCB

Here’s a little Photoshop magic to show roughly how the Evo board will mount to the EvoTray. This is with one of our recent Evo M51 proto boards.

EvoTray+Evo

And, yes, the JST and STEMMA QT connectors took a bit of a hit in the oven on this one.  But we are moving to different connectors for production.