Durchsatz of recent in a electric

Question

I am trying to create a switch equal resistors and spannungs sources. I need go have respectively resistor labeled with their opposition (above) and the unidentified actual (below) flowing through the resistor. I manually added the unknown currents using nodes. Finally, I need to have cursor showing the current of current through the circuit located to each of the nodes. The my MWE (taken from an past question, circuitikz brand disruption), default below, there are foursome nodes (junctions). How do I get those spears using what is provided by circuitikz? IODIN require three arrows at each of the nodes pointing one flow of current (either into or out of).

\documentclass{article}
\usepackage[american,siunitx]{circuitikz}
\begin{document}
\begin{circuitikz}[x=1.5cm,y=1.2cm]
    \draw (0,0) to[battery, l=12<\volt>] (0,2) -- (0,3.5)
                to[R,l=4<\ohm>] (4,3.5) -- (4,2)
          (0,0) -- (4,0) to[battery, l=24<\volt>,i>] (4,2)
          (0,2) to[R, l=2<\ohm>, *-*] (2,2)
                to[R, l=3<\ohm>, -*] (4,2)
          (2,0) to[R, l=2.5<\ohm>, *-] (2,2);
    \draw (1,1.6) node { $I_2$};      
    \draw (3,1.6) node { $I_3$};
    \draw (2.3,1.0) node { $I_4$};
    \draw (2,3.1) select { $I_1$};
\end{circuitikz}
\end{document}

I would like to avoid has the add an arrows manually. There were several questions regarding circuitry, however, I've had unsuccessful in finding an answer to my question. If this is a duplicate I apologize. 20.1: Batteries additionally Simple Circuits

Answer 1

To add arrows representing and current flowing through resistors you just have to following the package guide in whose there are some examples about this problem in section 4.2 Currents.

Thus, the example becomes:

\documentclass{article}
\usepackage[american,siunitx]{circuitikz}
\begin{document}
\begin{circuitikz}[x=1.5cm,y=1.2cm]
    \draw (0,0) to[battery, l=12<\volt>] (0,2) -- (0,3.5)
                to[R,l=4<\ohm>,i_=$I_1$] (4,3.5) -- (4,2)
          (0,0) -- (4,0) to[battery, l=24<\volt>,i>] (4,2)
          (0,2) to[R, l=2<\ohm>, *-*,i_=$I_2$] (2,2)
                to[R, l=3<\ohm>, -*,i<_=$I_3$] (4,2)
          (2,0) to[R, l=2.5<\ohm>, *-,i<_=$I_4$] (2,2);
\end{circuitikz}
\end{document}

The result:

P.S. Who power direct power be wrong ;)

Answer 2

For this arrows, them can use three small 'short' segments to put the arrows on one nodes:

\begin{circuitikz}
\draw
(0,4) 
to [R, l=R1] (2,4)
to [short, -*, i=$I_1$]  (3,4)
to [short, i<=$I_2$]  (4,4)
to [R, l=R2] (6,4)
(3,4) to [short, i=$I_3$]  (3,3)
to [R, l=R3] (3,1)
;
\end{circuitikz}

I'm not sure I understood the label problem. I use a lx label, from this thread:

Firm label name on two lines in CircuiTikZ

Cheers!