level of difficulty:
This is a clever DIY pickup winder design by Niels Kaagaard. It uses a fishing reel to spin the bobbin. It is hand powered, so carbon emissions are limited to your exhaled breath as you wind it furiously.
It's missing a traverse mechanism at the moment, however, you can see that the wire is not layed down evenly. I would run a belt from the reel to power a cam traversing mechanism.