I had an idea the other day to take a copper clad circuit board, and etch some sort of spiral into it to make an electromagnet. I'm not sure if this would have any particular advantages over some wire wound magnet, but the idea is just very intriguing to me.
It seems like having the coil so flat and right there at the surface would make it very strong when flush with some ferrous object. What do y'all think?
It seems like having the coil so flat and right there at the surface would make it very strong when flush with some ferrous object. What do y'all think?