% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{circuitikz}
    \draw (0,0) node[minimum width=1.5cm](start){\qty{4,1}{V}};
    \draw(start.east) to [stroke diode, invert] ++(3,0) coordinate(end);
    \draw(end) node[minimum width=1.5cm, anchor=west](){\qty{3,4}{V}};
\end{circuitikz}