Since KLtab is only 22 x 22 mm, one can fit four of them easily on a
5 x 5 cm piece of PCB. Here's an example with two of the four KLtabs
assembled in the minimal configuration:

http://downloads.qi-hardware.com/people/werner/kltab/tmp/kltab-minimum.jpg

In the unpopulated circuits in the back one can see holes in the center
pads. They were a misguided attempt of mine to properly solder that pad.
Unfortunately, the holes are a bit too small to get anything useful
done with them.  

I added a straightforward SWD-to-UBB pin assignment to the KLtab
schematics (lower right corner):

http://downloads.qi-hardware.com/people/werner/kltab/tmp/kltab-20140930.pdf

And this is what the corresponding cable looks like:

http://downloads.qi-hardware.com/people/werner/kltab/tmp/kltab-ubb-cable.jpg

Apart from the center pad hole mishap, the KLtabs were as easy to make
as expected, and they both identify nicely over SWD:

http://downloads.qi-hardware.com/people/werner/kltab/tmp/kltab-identify.jpg

- Werner

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