[Tex/LaTex] straight voltage arrows in circuitikz

arrowscircuitikz

I want straight voltage arrows in circuitikz, but all are bowed. Someone has a new solution? The bowed arrows are totally ugly.

\documentclass[a4paper,10pt]{scrartcl}
\usepackage{tikz}
\usepackage[european]{circuitikz}
\begin{document}
\begin{circuitikz}[scale=2,transform shape] \draw
 (0,0) to [battery1] (0,2)
 (0,0) --(4,0)
 (0,2) to [R, l=$\mathrm{R_{vor}}$, v=U] (2,2)
 (2,2) -- (4,2)
 (2,2) to [thRp, l=$\mathrm{R_{PT}}$, v=U] (2,0)
 (4,2) to [voltmeter] (4,0)
;\end{circuitikz}
\end{document}

Best Answer

According to this comment, the following may be a possible solution (beware: it has just been tested with the initial example, so it may need a bit more test-work).

I introduced a new option german (as per this comment) which is in charge to draw straight arrows: activate it with \ctikzset{voltage=german}.

The code:

\documentclass[a4paper,10pt]{scrartcl}
\usepackage[european]{circuitikz}


\makeatletter

\newif\ifpgf@circuit@germanvoltage
\ctikzset{voltage/german/.code = {\pgf@circuit@germanvoltagetrue } }

%% Output routine for generic bipoles

\def\pgf@circ@drawvoltagegeneric{
    \pgfextra{
        \ifnum \ctikzvalof{mirror value}=-1
                        \ifpgf@circuit@bipole@voltage@below\pgf@circuit@bipole@voltage@belowfalse\else\pgf@circuit@bipole@voltage@belowtrue\fi
        \fi

        \ifpgf@circuit@bipole@voltage@below
            \def\pgf@circ@voltage@angle{90}
        \else
            \def\pgf@circ@voltage@angle{-90} 
        \fi 

        \edef\pgf@temp{/tikz/circuitikz/bipoles/\pgfkeysvalueof{/tikz/circuitikz/bipole/kind}/voltage/distance from node}
        \pgfkeysifdefined{\pgf@temp}
            { \edef\distacefromnode{\ctikzvalof{bipoles/\pgfkeysvalueof{/tikz/circuitikz/bipole/kind}/voltage/distance from node}} }
            { \edef\distacefromnode{\ctikzvalof{voltage/distance from node}} }
        \edef\pgf@temp{/tikz/circuitikz/bipoles/\pgfkeysvalueof{/tikz/circuitikz/bipole/kind}/voltage/bump b}
        \pgfkeysifdefined{\pgf@temp}
            { \edef\bumpb{\ctikzvalof{bipoles/\pgfkeysvalueof{/tikz/circuitikz/bipole/kind}/voltage/bump b}} }
            { \edef\bumpb{\ctikzvalof{voltage/bump b}} }
    }

    coordinate (pgfcirc@mid) at ($(\tikztostart) ! \distacefromnode ! (\ctikzvalof{bipole/name}.left)$)
    coordinate (pgfcirc@Vfrom) at ($(pgfcirc@mid) ! -\ctikzvalof{voltage/distance from line}\pgf@circ@Rlen ! \pgf@circ@voltage@angle:(\ctikzvalof{bipole/name}.left)$) 

    coordinate (pgfcirc@mid) at ($(\tikztotarget) ! \distacefromnode ! (\ctikzvalof{bipole/name}.right)$)
    coordinate (pgfcirc@Vto) at ($(pgfcirc@mid) ! \ctikzvalof{voltage/distance from line}\pgf@circ@Rlen ! \pgf@circ@voltage@angle : (\ctikzvalof{bipole/name}.right)$)

    \ifpgf@circuit@bipole@voltage@below
        coordinate (pgfcirc@Vcont1) at ($(\ctikzvalof{bipole/name}.center) ! \bumpb ! (\ctikzvalof{bipole/name}.-110)$)
        coordinate (pgfcirc@Vcont2) at ($(\ctikzvalof{bipole/name}.center) ! \bumpb ! (\ctikzvalof{bipole/name}.-70)$)
    \else
        coordinate (pgfcirc@Vcont1) at ($(\ctikzvalof{bipole/name}.center) ! \bumpb ! (\ctikzvalof{bipole/name}.110)$)
        coordinate (pgfcirc@Vcont2) at ($(\ctikzvalof{bipole/name}.center) ! \bumpb ! (\ctikzvalof{bipole/name}.70)$)
    \fi

    \ifpgf@circuit@germanvoltage
      \ifpgf@circuit@bipole@voltage@below
        coordinate (pgfcirc@Vcont1) at ($(\ctikzvalof{bipole/name}.center) ! \ctikzvalof{voltage/bump a} ! (\ctikzvalof{bipole/name}.-120)$)
        coordinate (pgfcirc@Vcont2) at ($(\ctikzvalof{bipole/name}.center) ! \ctikzvalof{voltage/bump a} ! (\ctikzvalof{bipole/name}.-60)$)
    \else
        coordinate (pgfcirc@Vcont1) at ($ (\ctikzvalof{bipole/name}.center) ! \ctikzvalof{voltage/bump a} ! (\ctikzvalof{bipole/name}.120)$)
        coordinate (pgfcirc@Vcont2) at ($ (\ctikzvalof{bipole/name}.center) ! \ctikzvalof{voltage/bump a} ! (\ctikzvalof{bipole/name}.60)$)
      \fi
    \fi

    \ifpgf@circuit@europeanvoltage
        \ifpgf@circuit@germanvoltage
          \ifpgf@circuit@bipole@voltage@backward
            (pgfcirc@Vcont2)  -- node[currarrow, sloped,  allow upside down, pos=1] {} (pgfcirc@Vcont1)
          \else
            (pgfcirc@Vcont1)  -- node[currarrow, sloped,  allow upside down, pos=1] {} (pgfcirc@Vcont2)
          \fi
        \else
          \ifpgf@circuit@bipole@voltage@backward
            (pgfcirc@Vto) .. controls (pgfcirc@Vcont2)  and (pgfcirc@Vcont1) .. 
                node[currarrow, sloped,  allow upside down, pos=1] {} 
            (pgfcirc@Vfrom) 
          \else
            (pgfcirc@Vfrom) .. controls (pgfcirc@Vcont1)  and (pgfcirc@Vcont2) ..
                node[currarrow, sloped,  allow upside down, pos=1] {}
            (pgfcirc@Vto)   
          \fi  
        \fi      
    \else
        \ifpgf@circuit@bipole@voltage@backward
            (pgfcirc@Vfrom) node[inner sep=0, anchor=\pgf@circ@bipole@voltage@label@anchor]{\scriptsize$+$}   
            (pgfcirc@Vto) node[inner sep=0, anchor=\pgf@circ@bipole@voltage@label@anchor]{$-$}
        \else
            (pgfcirc@Vfrom) node[inner sep=0, anchor=\pgf@circ@bipole@voltage@label@anchor]{\scriptsize$-$}   
            (pgfcirc@Vto) node[inner sep=0, anchor=\pgf@circ@bipole@voltage@label@anchor]{$+$}
        \fi 
    \fi
}
\makeatother


\begin{document}
\begin{circuitikz}[scale=2,transform shape] 
\ctikzset{voltage=german}
\draw
 (0,0) to [battery1] (0,2)
 (0,0) --(4,0)
 (0,2) to [R, l=$\mathrm{R_{vor}}$, v=U] (2,2)
 (2,2) -- (4,2)
 (2,2) to [thRp, l=$\mathrm{R_{PT}}$, v=U] (2,0)
 (4,2) to [voltmeter] (4,0)
;
\end{circuitikz}
\end{document}

The result:

enter image description here

Related Solutions

[Tex/LaTex] Circuitikz voltage label independant of element

You can use

(3.5, 1.8) to [open,v=$v_1$] (3.5,0.2)

to draw the voltage between two points.

\documentclass[tikz,border=5pt]{standalone}
\usepackage{circuitikz}
\begin{document}
  \begin{circuitikz} [american voltages, baseline=(current bounding box.center)]
    \ctikzset { label/align = straight }
    \draw (0,0)

    % fake resistor, using for voltage label only
    (3.5, 1.8) to [open,v=$v_1$] (3.5,0.2)

    (1.5,2) to[short, -o] (1.5,2)
    (1.5,2) to[short,i=$i$, -o] (5,2)
    to[short] (4.5,2)
    (1.5,0) to[short, -o] (1.5,0)
    (1.5,0) to[short, -o] (5,0)
    to[short] (4.5,0);
    \node[draw,minimum width=2cm,minimum height=2.4cm,anchor=south west] at (4.5,-0.2){B};
    \node[draw,minimum width=2cm,minimum height=2.4cm,anchor=south west] at (0, -0.2){A};
  \end{circuitikz}
\end{document}

[Tex/LaTex] Black nodes in Circuitikz when adding voltage arrows

Add the voltage-specifiers without creating new nodes by adding the code after you specify it. Example: (opamp.+) to (A) to [open,v=$u_e(t)$] (B)

Suggestions

Don't specify manual options like curvature, unless you are sure that these are not the standards used in your country. There is an option to get European symbols.
Don't use the center environment. Use \centering instead, often inside the figure-environment.

Output

Code

\documentclass[12pt]{article}
\usepackage[european]{circuitikz}
\usetikzlibrary{arrows}
\begin{document}
\begin{figure}[hbt]
\centering
    \begin{circuitikz}[scale=.8,transform shape ]
    \ctikzset{voltage/distance from node=.2}% defines arrow's distance from nodes
    \ctikzset{voltage/distance from line=.02}% defines arrow's distance from wires
    \ctikzset{voltage/bump b/.initial=.1}% defines arrow's curvature

    \draw % draw nodes
    (0, 0) node[op amp,yscale=-1] (opamp) {}
    (-3,0.5) node[ocirc] (A) {}
    (-3,-3.8) node [ocirc] (B) {}
    (5,0) node[ocirc] (C) {}
    (5,-3.8) node[ocirc] (D) {} 

    (opamp.+) to (A) to [open,v=$u_e(t)$] (B)
    (opamp.-) -|  (-1.5,-1.8)
    to[short,*-] (.5,-1.8) 
    to [C,l=$C$] (2,-1.8)
    to [R,l=$R_1$] (3.2,-1.8)
    to [short,-] (3.8,-1.8) to [short,-*] (3.8,0)
    (opamp.out) to [short,-o] (C) to [open, v^=$u_a(t)$] (D)
    (B) to[short,-] (-1.5,-3.8) to [R,l=$R_2$,*-*] (-1.5,-1.8)
    (-1.5,-3.8) [short,*-o] to (D)
    ;
\end{circuitikz}
\end{figure}
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] Circuitikz voltage label independant of element

[Tex/LaTex] Black nodes in Circuitikz when adding voltage arrows

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