TTL_Hradlo_LED_T__1.tex

\documentclass[border=0.2cm]{standalone}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{tikz}
\usepackage{circuitikz}
\usepackage{siunitx}

\usetikzlibrary{arrows}
\usetikzlibrary{calc}
\usetikzlibrary{decorations.pathreplacing,angles,quotes}

\begin{document}

\ctikzset {
    logic ports=european,
    logic ports/scale=1.0,
    tripoles/european not symbol=ieee circle,
    resistors/scale=0.7,
    capacitors/scale=0.6,
    diodes/scale=0.6,
}

\begin{circuitikz}[european, straight voltages]
    \draw (0,0) node[american buffer port] (buf) {};
    \draw (buf.in) to[short, -o] ++(-0.25, 0);

    \draw (buf) to[short, -*] ++(1, 0) coordinate (j0);
    \draw (j0)  -- ++(0, -2) to[short, -o] ++(4, 0) node[above] {$Y$};

    \draw (j0) ++(2.5, 0) node[npn, tr circle] (npn) {};
    \draw (j0) -- ++(0.5, 0) to[R, l=$R_B$] (npn.B);

    \draw (j0) -- ++(0,2) coordinate (Rp);
    \draw (Rp) to[R, l=$R_P$] ++(0, 2) to[short, -o] coordinate (U_CC) ++(0, .25) node[above] (pwr){$U_{CC}$};
    
    \draw (npn.E) -- ++(0, -0.5) node[rground] {};
    \draw (npn.C |- U_CC) coordinate (U_B) node[above] {$U_{B}$};
    \draw (npn.C |- Rp) coordinate (Rmirror) -- (npn.C);

    \draw (Rmirror) to[leD-, diodes/scale=0.6, led arrows from anode] (npn.C);
    \draw (U_B) to[short, o-] ++(0, -0.25) to[R, l_=$R$] (Rmirror);
\end{circuitikz}
\end{document}