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Best way to jump 2.5mm gap between PCBs?

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3dgeo:
Hello,

I need to find cheap solution to jump from bottom to top PCB (4 contacts, 2 pins below 1A, others logic level, 1.6mm PCB, 2.5 mm gap between PCBs,).
For oneoff regular 2.54mm pin header works, but I need better solution for bigger quantities (SMT, PNP).

Pogo jumpers like in the picture below would be perfect, but those cost a lot and PNP of them would be expensive as well...

All suggestions are  welcome  :-+



Update:
I found that batteries connector might be a good solution and those are cheap.
These ones looks promising (even if hand soldering it would not be that labor intensive as pin header):


jhpadjustable:
Watching with interest, and I'll offer a couple of wacky PnP-compatible ideas.

FFC connectors are not terribly expensive. It might cost a bit if you need to pay someone to manually insert a flat flex during assembly of one board to the other.

Mezzanine connectors like Hirose FC series are available in 2.5mm and several other mated heights, but might not compete too favorably on price with the pogo pins.

T3sl4co1l:
Only 4 pins?  EMI fingers touching SMT pads may be less eye-watering on cost.

Tim

Nusa:
If they're low power signal connections: https://en.wikipedia.org/wiki/Elastomeric_connector

T3sl4co1l:
Good idea, would work for logic signals.  May need to buffer them if you need any speed or current capacity.  Depending on how much resistance you get with them.  Would still want to see a metallic ground, and same idea with power if needed.

Tim

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