Circuitikz: How can I specify the direction of rotation for a label?

Question

The following MWE rotates the label by +90°. How can I achieve rotation by -90° without changing the direction of the drawn path?

MWE:

\documentclass[margin=5mm]{standalone}
\usepackage{amsmath}
\usepackage{siunitx}
\usepackage{tikz}
\usepackage[european, straightvoltages,americanvoltages]{circuitikz}
\begin{document}
\begin{circuitikz}
\draw (0,0) to[R,l={\mbox{$R=\SI{50}{\ohm}$}},label/align=rotate] (0,-2);
\end{circuitikz}
\end{document}

Rmano · Accepted Answer · 2022-10-31T10:41:32.910

3

Using just circuitikz, you can't; label directions are fixed, and try to follow the stroke direction when using rotate, in the same way the sloped TikZ option work. But you can (being careful about the rotation center, and about protecting the [align=c] from the TikZ parser), do this:

\documentclass[margin=5mm]{standalone}
\usepackage{amsmath}
\usepackage{siunitx} % siunitx option to circuitikz will load it, also
%\usepackage{tikz}% circuitikz will load it
\usepackage[european, americanvoltages]{circuitikz}
\begin{document}
\begin{circuitikz}
    \ctikzset{label/align=rotate}
    \draw (0,0) to[R,l={\rotatebox[origin=c]{180}{$R=\SI{50}{\ohm}$}}] (0,-2);
    \draw[red] (2,0) to[R,l={$R=\SI{50}{\ohm}$}] (2,-2);
\end{circuitikz}
\end{document}

I have also removed the (confusing, and useless) straightvoltages, which is overridden by americanvoltages.

edited Oct 31 '22 at 10:41

answered Oct 31 '22 at 10:36

Rmano

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Thanks for your answer, but I can't manage to compile it due to the origin=c option. – MulticolMetallurgist Oct 31 '22 at 10:57
Probably you have an old circuitikz: check https://tex.stackexchange.com/questions/524328/i-need-to-use-a-different-version-of-circuitikz-how-can-i-do-that, you need something better than 1.3 more or less (I do not have time to check exactly). Or you can add an \mbox around the \rotatebox command, maybe) – Rmano Oct 31 '22 at 11:02
Should work since version 1.3.0, released on January 2019. – Rmano Oct 31 '22 at 18:39
Thank you all, I will try an update. – MulticolMetallurgist Nov 01 '22 at 10:07
With circuitikz updated, it works like a charm. Thanks again! – MulticolMetallurgist Nov 01 '22 at 22:32

Circuitikz: How can I specify the direction of rotation for a label?

1 Answers1