How to set circuitikz node label position in \draw mode

Question

I'm having trouble when trying to position a label of a circuit element in \draw mode.

\documentclass{article}
\usepackage{tikz}
\usepackage[american, siunitx]{circuitikz}

\begin{document}

\begin{figure*}[h]
\centering
\begin{tikzpicture} \draw
(0,0) node[ocirc]{Anode} to[short,i=$i'_D$] (1,0) to[empty diode, v=$v'_D$] 
(3,0) node[ocirc]{Cathode};
%\node at (0,0) [left] {Anode};
%\node at (3,0) [right] {Cathode};
\end{tikzpicture}
\caption*{Figure: Diode}
\end{figure*}

\end{document}

The only alternative I can think of is placing and labeling individual nodes (commented) but I was just wondering if there was a more efficient way. I tried node[ocirc, left] but that wouldn't compile & I'm unsure why, is it because nodes must be dealt with differently in the draw mode?

Best regards, Matthew

Answer 1

Probably better to use a label for the node. The custom node types from circuitikz is intended to only generate the shape I believe, not include text.

Regarding why node[ocirc,left] didn't work, the error message you get gives a hint, in that it says east is not known. The left option sets anchor=east, but apparently the ocirc node doesn't define any anchor called east, and hence you get an error.

\documentclass{article}
\usepackage[american, siunitx]{circuitikz}

\begin{document}

\begin{figure*}
\centering
\begin{tikzpicture} \draw
(0,0) node[ocirc,label=left:Anode]{} to[short,i=$i'_D$] (1,0) to[empty diode, v=$v'_D$] 
(3,0) node[ocirc,label=right:Cathode]{};
\end{tikzpicture}
\caption*{Figure: Diode}
\end{figure*}

\end{document}