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Grandpa

wrote:
Traditionally, I buy a ten lb bar of chocolate for Easter. Half goes
to the kids. The other half goes in my desk drawer at work (plus half
of what I gave the kids because they're not nearly as passionate as I
am for chocolate, but that's another story).

Cutting this bar is never fun. I've thought about making a chocolate
cutter out of a piano wire or maybe a guitar string - sort of like the
big cheese cutters they use at the cheese store that I frequent. If I
could heat the wire, it would make the job much easier. Is there a
safe way to electrically heat such a wire sufficiently to cut
chocolate? What sort of low-voltage circuit could I use for this? Or
is this idea completely off the wall?

Clever idea, but piano wire or a guitar string won't have enough
resistance to heat up when you apply a current. You want something
like nichrome wire which is used in styrofoam cutters. Check eBay.
There are some which will run on 2 "D" batteries.

--
Grandpa