How can I create a new component and include it in CircuiTikZ? For example a 4 bit adder?

3 Answers 3


There is an easy way. Use an existing component as a base, such as to[generic,color=white,n=myname] and draw anything you want in the space.

\newcommand{\speaker}[2] % #1 = name from to[generic,n=#1], #2 = rotation angle
{\draw[thick,rotate=#2] (#1) +(.2,.25) -- +(.7,.75) -- +(.7,-.75) -- +(.2,-.25);}
\draw (0,2) to[C, l_=$C$, o-*] (2,2) to[short, -*] (3.5,2) to[short] (5,2);
\draw (0,0) to[short, o-*] (2,0) to[short, -*] (3.5,0) to[short] (5,0);
\draw (2,2) to[L=$L$] (2,0);
\draw (3.5,2) to[R=$R$] (3.5,0);
\draw (5,2) to[generic, n=S1](5,0);

enter image description here

I have improved on my technique since then, as explained in the following tutorials.




  • I just want to note that \speaker{S1}(0} should be \speaker{S1}{0}, but it won't let me do a single character edit. Great example!
    – Rinchen
    Mar 2, 2014 at 4:30

Components in CircuiTikz are defined in the pgfcirc*poles.sty files via pretty much low-level pgf commands. You can either

  1. try looking at the *sty files, in particular pgfcirctripoles.sty there most ports are defined, and cut&paste your way to a new component. If you manage to code it, please send it to me so I can add it for everyone to use :)
  2. send me a PNG of how you want the adder to look, and wait for me to code it ^^ I have a few requests in queue, and it is time I updated the package afterall...
  • 2
    I don’t understand anything in the .sty files :( Couldn’t you make a Tutorial ? Thanks for your help, your package is very nice !
    – Calixte
    May 28, 2011 at 21:09
  • Would it be possible to add Darlington transistor? I do have some experience with PGF commands, but I was completely lost reading the style file.
    – Pygmalion
    Apr 5, 2021 at 16:41

Just an update: notice that in version 0.9.0

  1. there is a loudspeaker component, and
  2. there is an (admittedly short) part about how to add components in the manual.

Unfortunately, to add components you should have a bit of knowledge of the pgf basic layer (part IX of the TikZ-PGF manual).

example circuit for 0.9.9

  • I like necromancer badges! BTW, there is a mux-demux component since 1.0 that can be used to create adders, ALUs, etc...
    – Rmano
    Jun 6, 2020 at 10:49

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