circuitikz vs. tikzpicture: generating multipage standalone documents for animations

If you say \documentclass[border = 5pt, tikz]{standalone} this does not just load tikz but also tells standalone that it should produce single pdf pages for each tikzpicture. In order to generate separate pdf pages for circuitikz you could do

\documentclass[border = 5pt, tikz]{standalone}
\usepackage{circuitikz}
\standaloneenv{circuitikz}
\begin{document}
\foreach \k in {1,...,10}
{
\begin{circuitikz}
  \draw (0, 0) rectangle (2, 2);
  \fill[red] (\k/5, 1) circle (0.1);
\end{circuitikz}
}
\end{document}

Note that this possibility is not unique. Another possibility is to use

\documentclass[border = 5pt, multi={circuitikz}]{standalone}
\usepackage{circuitikz}
\begin{document}
\foreach \k in {1,...,10}
{
\begin{circuitikz}
  \draw (0, 0) rectangle (2, 2);
  \fill[red] (\k/5, 1) circle (0.1);
\end{circuitikz}
}
\end{document}

instead. For further information, please consult the standalone manual on p. 10.

The same as an animated SVG, using the animations library of TikZ/Pgf-3.1:

Compile with

latex example
dvisvgm --zoom=-1 example 

example.tex:

\documentclass[dvisvgm]{standalone}
\usepackage{circuitikz}
\usetikzlibrary{animations}

\begin{document}

\begin{circuitikz}
  \draw (0, 0) rectangle (2, 2);
  \scoped [name=circle, animate = {
      object=circle, :shift = { 0s = "{(1/5,1)}", 3s = "{(2,1)}", repeats }
    }
  ] \fill[red] (0,0) circle (0.1);
\end{circuitikz}

\end{document}