This is amazing (particular the hand soldering - I love the genre of "this is impossible, you'd need to do this thing thousands of times" "so I did the thing thousands of times" persistence) but I wonder, now that homebrew pick-and-place is starting to become a thing, is there any practical way to take advantage of that? I pick-and-place tip that was vaguely like a wire-wrap tool seems almost plausible. Or is this more like bond-wires on chips and needs an order of magnitude more precision?
For this PCB, the smallest targets are about 0.2mm in diameter. In terms of precision robotics, this is very manageable. A robotic soldering iron, or even a laser soldering system, with a wire feeder and cutter could be used to make something like a rudimentary die-bonder, that simply solders the wires to the correct pads.
My background in process engineering made me lean towards a figuring out very manual process that could be automated, instead of figuring out a highly automated process.
