Electronics > Projects, Designs, and Technical Stuff

Mount PCBs together in a 90° angle

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DomesticHacks:
I'm planning a project with two PCBs.
The second PCB has to be mounted on the first one in a 90° angle.
I haven't that much space so I don't think i could use some kind of connector like a pinheader.

Is there a best practice for doing this?

ajb:
If your PCB fabricator supports internal routing (most (all?) of the inexpensive ones don't, at least not officially), then you could route a slot in one board that the other slots into.  Careful alignment of copper pads on the edge of each will allow you to solder them together, preferably on both sides, which should be pretty sturdy if your slot is sized to a close fit. 

gregallenwarner:
Depends on how the PCB's are gonna be used. Are there going to be any stresses on one or both of them? In which direction will the forces be applied? Will it be under constant stress, i.e., buttons on one of the boards routinely being pressed? What about separation of the boards? Do you want them to be easily separable for working on them?

I'd recommend you build your chassis/mounting hardware such that it takes most of the stress away from the electrical connections.

PointyOintment:

--- Quote from: ajb on March 28, 2014, 01:56:55 pm ---If your PCB fabricator supports internal routing (most (all?) of the inexpensive ones don't, at least not officially), then you could route a slot in one board that the other slots into.  Careful alignment of copper pads on the edge of each will allow you to solder them together, preferably on both sides, which should be pretty sturdy if your slot is sized to a close fit.

--- End quote ---

OSH Park allows it:


--- Quote from: OSH Park ---Internal cutouts are allowed and supported. Draw them on your board outline layer.

--- End quote ---

daqq:
There are several options that come to mind:

REALLY small board-board connectors
Flexible hybrid PCB ( http://www.pcdandf.com/cms/magazine/95/2948 ) - you can do really amazing assemblies with this
Just solder one on the other as though it was an SMD device
What you said

The last two options are mechanically somewhat risky, and should be used with care - repeated stress can cause delamination of your PCB.

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