Are there DAC and DAC shapes in `circuitikz`?
You know, the irregular pentagon (line assure/rectangle with a triangular side).

Trying to write a `\pgfdeclareshape` for it, but wondered if someone already had done it.

One thin is if you try to draw lines to/from it, it takes the bounding rectangle. Also have a `\tip` anchor for the tip of the "triangle part".

```
\tikzstyle{rectangulo}=[
    draw, fill=#1, very thick, regular polygon, regular polygon sides=4,
    text width=1cm, minimum width=2.25cm, minimum height=1.5cm,
    outer sep=0, inner sep=0
]

\tikzstyle{DAC}=[
    draw, fill=#1, very thick,
    text width=1cm, minimum width=2.25cm, minimum height=1.5cm,
    outer sep=0, inner sep=0%,
%    path (-0.75cm,-0.75cm) 
%      -- (-1.50cm, 0     ) 
%      -- (-0.75cm, 0.75cm) 
%      -- ( 0.75cm, 0.75cm) 
%      -- ( 0.75cm,-0.75cm) 
%      -- cycle;
]

\newcommand{\blocksDAC}[3]{%
 \coordinate (D) at (#1,#2);
 \node[rectangulo=pink!30, 
       outer sep=0] (#3) at (D) {};
 \beginpgfgraphicnamed{#3}
   \node[DAC=purple!10, shift=(D), draw=green, fill=none, name path=#3] (CCC)  {}
        (-0.75cm,-0.75cm) 
     -- (-1.50cm, 0     ) 
     -- (-0.75cm, 0.75cm) 
     -- ( 0.75cm, 0.75cm) 
     -- ( 0.75cm,-0.75cm) 
     -- cycle;
   \node[font=\Large] (Badc) at (D) {\texttt{ADC}};
  \endpgfgraphicnamed
}%\blocksDAC

%------------------------------------------------------------------------------
\begin{document}
%------------------------------------------------------------------------------

\begin{center}
 \begin{tikzpicture}[line width=0.5mm] 
   \blocksDAC{0}{-2}{Bdac}
   \draw (Bdac) -- (5,0);
  \end{tikzpicture}
\end{center}

%------------------------------------------------------------------------------
\ end{document}
%------------------------------------------------------------------------------

```