cir­cuitikz – Draw elec­tri­cal net­works with TikZ

The pack­age pro­vides a set of macros for nat­u­rally type­set­ting elec­tri­cal and (some­what less nat­u­rally, per­haps) elec­tronic net­works.
It is de­signed as a tool that is easy to use, with a lean syn­tax, na­tive to LaTeX, and di­rectly sup­port­ing PDF out­put for­mat.
So is based on the very im­pres­sive pgf/TikZ pack­age.