% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{circuitikz}
    \draw(0,0) coordinate(U1B) 
        to [short,o-] ++(3,0) coordinate(d2)
        to [short,-o] ++(1.5,0) coordinate(U2B);
    \draw(0,3) coordinate(U1A) 
        to [R,l_={$R_\mathrm{V}$}, o-] ++(3,0) coordinate(d1)
        to [short, -o] ++(1.5,0) coordinate(U2A);
    \draw(d2) 
        to [stroke Zener diode, mirror, i^<={$I_\mathrm{Z}$}, v<={\qty{4,7}{\volt}}, *-*] (d1);
    \draw(U2A)
        to [short, o-] ++(1,0)
        to [R,l_={$R_\mathrm{L}$}, i>_={$I_\mathrm{L}$}] ++(0,-3)
        to [short, -o] (U2B);
    
    \draw(U1A) node[anchor=east](){+\qty{13,8}{\volt}};
    \draw(U1B) node[anchor=east](){\qty{0}{\volt}};
\end{circuitikz}