Electronics > Projects, Designs, and Technical Stuff
Mount PCBs together in a 90° angle
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michaelym:
You can use PCB slot connectors (like PCI) and still have some mechanical freedom (with the correct connectors and PCB thickness)
DomesticHacks:
Thanks for all of your suggestions. I think I will use the smallest pin header I can find or maybe a slot (have to figure out the best way to do it in Eagle).
fcb:
Might be a tad big.  But have a look at DIN41612 connectors.
EEVblog:
Put a plated through slot on the main board, and routed fingers with pads on the other board <1.6mm (PCB thickness) in length, insert and solder both sides for rigidity. This is quite a common technique for mounting (small) boards at right angles.
Psi:
i've used 90deg 2.54mm header blocks (2row by 8 ) to mount boards at 90deg without any problems. 

You need to decide on the best way to use the connector, rotation wise.
This is the way i found worked the best for me. But you do have to make sure the holes in the vertical PCB (V) are not too close to the edge.
Not all headers are created equal in terms of plastic height, (the bit that rests on the H PCB).

         V
         V
     ---V-----||-\
     ---V-----||\ |
HHHHHHHHH | |HHHH
                    '  '

(The V board would obviously be soldered hard right, up against the plastic, i just drew it in the middle to make it clearer)

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