\begin{circuitikz}[scale = 0.7, transform shape]

  
%  \draw[help lines] (0,0) grid (8,6);
%  \foreach \x in {0,...,15} \draw (\x,-1) node {\x};
%  \foreach \x in {0,...,7} \draw (-1,\x) node {\x};


  % op, refpunkt ist der ausgang
%  \draw(13,1) node[en amp, anchor=out] (op) {};
%  \draw(op.+) -| (10,-0.1) node[rground]{};
%  \draw(op.-) -| (10,3) to (11.5,3) to[R=$R_{gk}$, a=1$k\Omega$] (13,3) -| (op.out);
  % ausgangsbeschaltung
%  \draw(op.out) to[short,-o] (13.5,1){};
%  \draw[-{Triangle[scale=2.5, length=2, width=2]}](13.5,0.8) -- (13.5,0.2);
%  \draw(14,0.5) node[]{\Large{$U_a$}};
%  \draw (13.5,0) to[short,o-] (13.5,-0.1) node[rground]{};
  
  \ctikzset{label/align = rotate}
  % von rechts nach links aufgebaut
  \pause
  %
  \draw(14,4) to[R=$2\cdot R_0$, a=2$k\Omega$] (14,6) -- (12,6);
  \draw(14,4) node[rground]{};
  \pause
  \draw[color=blue](13.5,5.5) -- (13.5,9);
  \draw[color=blue,-{Latex[scale=2.5, length=2, width=2]}](13,8.5) -- (13.5,8.5);
  \draw(13,8.5) node[anchor=east, color=blue]{2$k\Omega$};
  %
  \pause
  \draw(12,4) to[R=$2\cdot R_0$, a=2$k\Omega$] (12,6);
  \draw(12,4) node[rground]{};
  \pause
  \draw(12,6) -- (11.2,6);
  \draw[color=blue](11.5,5.5) -- (11.5,9);
  \draw[color=blue,-{Latex[scale=2.5, length=2, width=2]}](11,8.5) -- (11.5,8.5);
  \draw(11,8.5) node[anchor=east, color=blue]{1$k\Omega$};
  %
  \pause
  \draw(9,6) to[R=$R_0$, a=1$k\Omega$] (12,6);
  \pause
  \draw[color=blue](9.5,5.5) -- (9.5,9);
  \draw[color=blue,-{Latex[scale=2.5, length=2, width=2]}](9,8.5) -- (9.5,8.5);
  \draw(9,8.5) node[anchor=east, color=blue]{2$k\Omega$};
  %
  \pause
  \draw(9,4) to[R=$2\cdot R_0$, a=2$k\Omega$] (9,6);
  \draw(9,4) node[rground]{};
  \pause
  \draw(9,6) -- (8.2,6);
  \draw[color=blue](8.5,5.5) -- (8.5,8.2);
  \draw[color=blue,-{Latex[scale=2.5, length=2, width=2]}](8,8) -- (8.5,8);
  \draw(8,8) node[anchor=east, color=blue]{1$k\Omega$};
  %
  \pause
  \draw(6,6) to[R=$R_0$, a=1$k\Omega$] (9,6);
  \pause
  \draw[color=blue](6.5,5.5) -- (6.5,9);
  \draw[color=blue,-{Latex[scale=2.5, length=2, width=2]}](6,8.5) -- (6.5,8.5);
  \draw(6,8.5) node[anchor=east, color=blue]{2$k\Omega$};
  %
  \pause
  \draw(6,4) to[R=$2\cdot R_0$, a=2$k\Omega$] (6,6);
  \draw(6,4) node[rground]{};
  \pause
  \draw(6,6) -- (5.2,6);
  \draw[color=blue](5.5,5.5) -- (5.5,8.2);
  \draw[color=blue,-{Latex[scale=2.5, length=2, width=2]}](5,8) -- (5.5,8);
  \draw(5,8) node[anchor=east, color=blue]{1$k\Omega$};
  %
  \pause
  \draw(3,6) to[R=$R_0$, a=1$k\Omega$] (6,6);
  %\draw[color=blue](3.5,5.5) -- (3.5,9);
  %\draw[color=blue,-{Latex[scale=2.5, length=2, width=2]}](3,8.5) -- (3.5,8.5);
  %\draw(3,8.5) node[anchor=east, color=blue]{2$k\Omega$};
  %
  \draw(3,4) to[R=$2\cdot R_0$, a=2$k\Omega$] (3,6);
  \draw(3,4) node[rground]{};
  %\draw[color=blue](2.5,5.5) -- (2.5,8.2);
  %\draw[color=blue,-{Latex[scale=2.5, length=2, width=2]}](2,8) -- (2.5,8);
  %\draw(2,8) node[anchor=east, color=blue]{1$k\Omega$};

  % uref
  \draw(0,4) node[rground]{} to[V_<=\large{16V}, l^=\large{$U_{ref}$}] (0,6)
  to (3,6);

  
  %potentiale
  \pause
  \draw[color=red](3,7) node[anchor=south]{16V};
  \draw[color=red,-{Latex[scale=2.5, length=2, width=2]}](3,7) -- (3,6.1);
  %
  \pause
  \draw[color=red](6,7) node[anchor=south]{8V};
  \draw[color=red,-{Latex[scale=2.5, length=2, width=2]}](6,7) -- (6,6.1);
  %
  \pause
  \draw[color=red](9,7) node[anchor=south]{4V};
  \draw[color=red,-{Latex[scale=2.5, length=2, width=2]}](9,7) -- (9,6.1);
  %
  \pause
  \draw[color=red](12,7) node[anchor=south]{2V};
  \draw[color=red,-{Latex[scale=2.5, length=2, width=2]}](12,7) -- (12,6.1);

  \ctikzset{label/align = straight} 

  
  
\end{circuitikz}
