circuitikz：如何在电流表中添加 + 、 - ？

Question

我创建了不带箭头的电流表。我想在电流表外面添加 + 和 -。

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

\begin{document}

\begin{frame}
\begin{circuitikz}[x=3cm,y=3cm]
\draw (0,0) to[ammeter] ++(1,0);
\draw (0,-1) to node[draw,circle,fill=white,thick]{A} ++(1,0);
\end{circuitikz}
\end{frame}

\end{document}

Answer 1

像这样？

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

\begin{document}

\begin{frame}
\begin{circuitikz}[x=3cm,y=3cm]
\draw (0,0) to[ammeter] ++(1,0);
\draw (0,-1) to node[draw,circle,fill=white,thick](A){A} ++(1,0);
\node[xshift=-3mm] at (A.south west){$+$};
\node[xshift=3mm] at (A.south east){$-$};
\end{circuitikz}
\end{frame}

\end{document}

Answer 2

您可以通过在其旁边放置一些节点来手动完成此操作：

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

\begin{document}

\begin{frame}
\begin{circuitikz}[x=3cm,y=3cm]
\draw (0,0) to[ammeter] ++(1,0);
\draw (0,-1) to node[draw,circle,fill=white,thick](a){A} ++(1,0);
\path (a.west) node[above left,inner sep=1pt] {$-$} (a.east) node[above
right,inner sep=1pt] {$+$};
\end{circuitikz}
\end{frame}

\end{document}