HP48GX RAM card design

[wan]

(01-19-2021 02:03 AM)mfleming Wrote:  I'd love to see a picture of the other side as well.

No component on back side. The backboard is not attatched in this one. See attatchment 1. With backboard see attatchment 2.

(01-19-2021 02:03 AM)mfleming Wrote:  The PCB you've labeled Middle Board isn't just a spacer, there are tracks and unpopulated component pads. Was it meant to be part of the design?

No, they have no use at all. They are used to misleading board manufacturer into thinking this is a "useful" board.

(01-19-2021 02:03 AM)mfleming Wrote:  You might cement a plastic sheet (preferably clear!) over the top surface to keep fingers out, and with a notch to pull the battery out from the side.

Nice idea!