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This is an old revision of the document!
We had the need to test a custom module that came back from assembly. The module is meant to be soldered onto another PCB via castellated pins and is very small.
As holding a multimeter probe (even if its a PCBite) would be a nightmare for more than one piece, I designed a little test jig that uses 0.7mm (!) pogo pins (MPN: 1007-D-0.7N-AU-0.49). The pogo pin holder is 3d printed with the 0.4mm standard nozzle diameter and surprisingly comes out well. Even if it's hitting the resolution limit of the Prusa.
Soldering process: