How to draw manually some letters in TikZ?

Question

I come from this question that I did a while ago, and now I need to add letters with the same height as the figure that is enclosed by the two circles. I try adding

\draw[line width=3mm] ([xshift=9.5cm]a.north west) to [out=-90,in=-90,looseness=4] ([xshift=13.5cm]a.north west);

to the code but it is not the "U" that I expected haha (I also do not know how to indicate to the looseness command the value that corresponds to the height of the figure). Here is my MWE:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calc}

\begin{document}

\begin{tikzpicture}[scale=0.5]
    \draw[line width=1mm] (0,0) circle (4.5cm);
    \draw[line width=1mm] (0,0) circle (5cm);
    \node[minimum size = 2cm,anchor=center,line width=3mm] (a){};
    \draw[line width=3mm] ([xshift=\pgflinewidth]a.north west) arc (180:360:2cm and 2cm-0.5\pgflinewidth)
    (a.west) -- (a.east)(a.north) -- (a.south) ([xshift=\pgflinewidth]a.south west) arc (180:0:2cm and 2cm-0.5\pgflinewidth);

    \draw[line width=3mm] ([xshift=9.5cm]a.north west) to [out=-90,in=-90,looseness=4] ([xshift=13.5cm]a.north west);
    \draw[line width=3mm] ([xshift=20cm]a.south west) to [out=90,in=90,looseness=4] ([xshift=24cm]a.south west);
\end{tikzpicture}

\end{document}

I must draw these letters and the dot:

Note: The thickness of a letter must be equal to the rest and a little smaller than the image (neither thin nor thick). Also note that the position of the horizontal line of the "A" is a little below the middle, and the upper belly of the "B" is smaller than the lower one.

Is there any way to do it using the command draw, path or something similar?

Thanks!

Answer 1

If your request is just your comment this is an answer... But I suppose it will teach you some things and will lead you to other questions untill you will fine out that could do it with other better ways...

\documentclass[10pt]{article}
\usepackage{tikz}
\usetikzlibrary{calc}

\begin{document}

\def\sc{0.5} \begin{tikzpicture}[inner sep =0,outer sep=0,line width={0.6*\sc cm},scale=\sc]
  \draw[line width={0.2*\sc cm}] (0,0) circle (4.5cm);
  \draw[line width={0.2*\sc cm}] (0,0) circle (5cm);
  \draw ({-2cm+0.2 cm},{2.2 cm}) arc (180:360:{2cm-0.2 cm});
  \draw ({-2 cm+0.2 cm},{-2.2 cm}) arc (180:0:{2cm-0.2 cm});
  \draw (-2cm,0)--(2cm,0);
  \draw (0cm,-2.2cm)--(0cm,2.2cm); 
  %\draw (8,2.2) to [out=-90,in=-90,looseness=3.5] (11.7,2.2);
  \draw (8cm,2.2cm)--(8cm,-1.2cm) arc(-180:0:1.5cm and 1.cm) --(11cm,2.2cm);
  %%% the line starts from top (y= 2.2 cm) and would come down to (y=-2.2cm)
  %%% but I stop the line 1 cm earlier (y= -1.2cm) and adding an arc with height=1cm
  %%% and a width 3cm (so x radius=1.5 cm and diameter 3cm)
\end{tikzpicture}
\end{document}

Output:

Answer 2

If you actually use a sans-serif fat black font you only need to modify the A letter. I've quickly did some eye-balling but you can actually make a modified pic out of this and use it, (run with LuaLaTeX)

\documentclass{article}
\usepackage{fontspec}
\usepackage{tikz}
\setsansfont{arista-pro.pro-trial-fat.ttf}
\begin{document}
\begin{tikzpicture}
\node[draw,font=\sffamily\fontsize{60}{72}\selectfont] (t) {U.ABD};
\node[fill=white,minimum width=0.773em,minimum height=1.5em] 
                                     at ([shift={(-3.675mm,-1.8mm)}]t.center) {};
\end{tikzpicture}
\end{document}

I've used the free-for-personal-use-font Arista Pro Trial Fat Black