I have a schematic that I'm trying to draw. It uses a custom symbol which is not listed in CircuiTikz manual. It should basically be a circle with 'N' in it.
My current code is:
\begin{circuitikz}
\draw
(0, 0) to[sV] (0, 6)
(0, 6) -- (7, 6)
(7, 6) -- (7, 5)
(7, 5) to[R] (5, 3)
(5, 3) to[R] (7, 1)
(7, 1) -- (7, 0)
(7, 0) -- (0, 0)
(7, 1) to[R] (9, 3)
(9, 3) to[R] (7, 5)
(5, 3) -- (7, 3)
circle [radius = 10pt]
(7, 3) -- (9, 3)
;
\end{circuitikz}
The image it produces is:
However, I can't make a circle without these lines in it and I don't know how to add an 'N' in the middle.