% Author: Dr. Matthias Jung, DL9MJ
% Year: 2022
% TB112
\begin{circuitikz}
    \draw (1.0,0) node { 0\,V};
    \draw (4.0,0) node {+5\,V};
    \draw (1,2.5) node {P};
    \draw (4,2.5) node {N};
    \path [fill=gray] (2,1) rectangle (3,2);
    \draw (0,1) rectangle (5,2);
    \draw (1.5,0) to [stroke diode] ++(2,0);
    %
    \draw (0.25,1.75) node {$\oplus$};
    \draw (0.25,1.25) node {$\oplus$};
    \draw (0.75,1.75) node {$\oplus$};
    \draw (0.75,1.25) node {$\oplus$};
    \draw (1.25,1.75) node {$\oplus$};
    \draw (1.25,1.25) node {$\oplus$};
    \draw (1.75,1.75) node {$\oplus$};
    \draw (1.75,1.25) node {$\oplus$};
    %
    \draw (3.25,1.75) node {$\ominus$};
    \draw (3.25,1.25) node {$\ominus$};
    \draw (3.75,1.75) node {$\ominus$};
    \draw (3.75,1.25) node {$\ominus$};
    \draw (4.25,1.75) node {$\ominus$};
    \draw (4.25,1.25) node {$\ominus$};
    \draw (4.75,1.75) node {$\ominus$};
    \draw (4.75,1.25) node {$\ominus$};
\end{circuitikz}