You might check out the Aerator font set from T.26 for a different approach to electricity/magnetism.

Or Emigre's Elektrix

Or Shatter.

There's a fontographer font called Stigmata that's cool too - I have it but can't find it anywhere on the web! What happened to all the fontographer fonts???

OS X ate them (because it doesn't like Type 3 fonts) & all the old Monotype ones too.

So you mean when I upgrade to OS X I won't be able to use all these fonts I have so lovingly collected???

Aarco is classic, but there's also Zap Bats.