73 lines
2.3 KiB
TeX
73 lines
2.3 KiB
TeX
% Author: Dr. Matthias Jung, DL9MJ
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% Year: 2020
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% TB405
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\begin{tikzpicture}
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\begin{scope}[gray!50, thick]
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\draw (-1,0.75) -- (4.5,0.75);
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%\draw (-1,1.25) -- (4.5,1.25);
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%\draw (4.5,0.75) arc (-90:90:0.25) ;
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%\draw (-1,1.25) arc (90:270:0.25) ;
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%
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\draw (-1,0.45) -- (4.5,0.45);
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%\draw (-1,1.55) -- (4.5,1.55);
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%\draw (4.5,0.45) arc (-90:90:0.55) ;
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%\draw (-1,1.55) arc (90:270:0.55) ;
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%
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\draw (-1,0.15) -- (4.5,0.15);
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%\draw (-1,1.85) -- (4.5,1.85);
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%\draw (4.5,0.15) arc (-90:90:0.85) ;
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%\draw (-1,1.85) arc (90:270:0.85) ;
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%
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\draw (-1,-0.75) -- (4.5,-0.75);
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%\draw (-1,-1.25) -- (4.5,-1.25);
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%\draw (4.5,-1.25) arc (-90:90:0.25) ;
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%\draw (-1,-0.75) arc (90:270:0.25) ;
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%
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\draw (-1,-0.45) -- (4.5,-0.45);
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%\draw (-1,-1.55) -- (4.5,-1.55);
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%\draw (4.5,-1.55) arc (-90:90:0.55) ;
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%\draw (-1,-0.45) arc (90:270:0.55) ;
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%
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\draw (-1,-0.15) -- (4.5,-0.15);
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%\draw (-1,-1.85) -- (4.5,-1.85);
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%\draw (4.5,-1.85) arc (-90:90:0.85) ;
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%\draw (-1,-0.15) arc (90:270:0.85) ;
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%
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\end{scope}
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% Define a formula for the coil.
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% This is what the numbers mean:
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% A ... how far the rings are apart
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% B ... how much from the side the rings are seen (try 0 and the same as the radius)
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% C ... radius of the rings
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\def\coil#1{
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% A B
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{0.3 * (2*#1 + \t) + 0.55*sin(\t * pi r))},
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% C
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{1.0 * cos(\t * pi r)}
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}
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% Draw the part of the coil behind the rectangle
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\foreach \n in {0,1,...,5} {
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\draw[domain={0.2:0.7},smooth,variable=\t,samples=15, loosely dashed, thick]
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plot (\coil{\n});
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}
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% Draw the part of the coil in front of the rectangle
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\foreach \n in {0,1,...,5} {
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\draw[domain={0.7:2.2},smooth,variable=\t,samples=15, thick]
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plot (\coil{\n});
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}
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\draw[domain={ 0.0:0.5},smooth,variable=\t,samples=15,thick] plot (\coil{6});
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\draw[domain={-0.5:0.2},smooth,variable=\t,samples=15,thick] plot (\coil{0});
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\draw[thick](-0.7,0) -- (-0.7,-2);
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\draw[thick](4.3,0) -- (4.3,-2);
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\draw[thick](4.3,-2.1) circle (0.1);
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\draw[thick](-0.7,-2.1) circle (0.1);
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\end{tikzpicture}
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