% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{circuitikz}
    \draw(0,0) 
        node[anchor=east](){\qty{0}{\volt}}
        to [short, o-] ++(4,0) coordinate(b);
    \draw(0,3)
        node[anchor=east](){+\qty{13,8}{\volt}}
        to [R,l_={$R_\mathrm{V}$}, o-*] ++(3,0) coordinate(dc1)
        to [short,-o] ++(1,0) coordinate(a);
    \draw(3,0)
        to [stroke Zener diode, mirror,i^<={$I_\mathrm{Z}$}, *-] (dc1);
    \draw(a)
        to [short, o-] ++(1,0)
        to [R,l_={$R_\mathrm{L}$}, i>_={$I_\mathrm{L}$}] ++(0,-3)
        to [short, -o] (b);
\end{circuitikz}