CTAN has a new package: ELTEX
This macro enables you to draw simple electrical circuit diagrams in the picture environment withouth any special fonts. The application of this macro for drawing is proper for school materials in education area. The circuit symbols are accordingly the IEC 617 standard. No special requirements to hardware or installation. It runs in latex2.09 or latex2e.
This package is located at http://tug.ctan.org/tex-archive/macros/latex/contrib/eltex . More information is at http://tug.ctan.org/pkg/eltex (if the package is new it may take a day for that information to appear). We are supported by the TeX Users Group http://www.tug.org . Please join a users group; see http://www.tug.org/usergroups.html .
eltex – Simple circuit diagrams in LaTeX picture mode
The macros enable the user to draw simple circuit diagrams in the picture environment, with no need of special resources. The macros are appropriate for drawing for school materials. The circuit symbols accord to the various parts of the standard IEC 617.