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I'm working on a design and am going to source a smaller pcb and solder it to my design.

Before using the sourced board I'm wanting to test it and so I'm trying to design a test fixture similar in concept to the ones described in this Spark Fun Tutorial.

Here's a drawing of the pads along the outside of the board I need to connect to for the test:

board I need to test

The board that I'm sourcing is gold plated. The pads are on both the top and bottom of the board - but larger on the bottom - so I assume it's better to try to go the pogo pin route from either the top or the sides.

Here's a zoomed image of the pads from the bottom. (my apologies for an image that's slightly blurry)

enter image description here

So first off I wonder if I should follow the spark fun tutorial and try to make a board that will connect to the pads from the bottom or perhaps I should try to get some type of pogo pin to try to go into the drilled portion of the pad at say a right angle. (finding a right angle pogo pin at 1.5 mm might be impossible in itself)

Anyway looking at the spark fun pogo pins they have some here but it's head size is 1.3mm so I'm thinking I'm asking for trouble using something with just .2mm clearance between heads.

I was wondering if anyone had experience using a pogo pin for this type of spacing and pads and what you'd recommend?

Thanks in advance.

-J

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There are few companies which make pogo pins for such small pitch. you can use a 1.5mm crimp housing connector as a quick hack, slide the pins through it and you have a ready made 1.5mm pitch test jig. However, a better approach would be to arrange the pins in a zigzag pattern (might not be possible in your case). Here is a 1.27mm pitch pogo: http://www.idinet.com/Test-Probes/Loaded-Board-Probes/ICT-Advantage/ICT-50C.aspx/

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