Comment Re:Can't light an LED (Score 2, Interesting) 234
Hmmm, that is a very good point. Assuming those objects have a hysteresis curve like any non-permanent magnet you would have to be careful about how you put them together. Maybe there is a way they can "wind" the strands around a core to negate any potential field problems, kind of like how interleaving windings on an inductor can help with copper loss. All things considered, sounds like a fun experiment!