How can I wind magnetic wire around a half sphere so that I end up with closed loops? How can I wind magnetic wire around a half sphere so that I end up with individual closed loops? There may be a better way to accomplish this so any suggestions would help a great deal. The way I would attack this is... starting with my half sphere that has a pin installed at the apex, wind magnetic wire around it spinning the half sphere until I have the desired wraps. Once this is done remove the pin so that I can insert a scroll saw blade equal to the pins' diameter. Following a straight line cut through the coiled wire exiting out to the outer perimeter. Insert/solder a copper shim into the new slot effectively closing each wire creating a local-bus. Well that my best shot, what do you think?