\begin{circuit}0

% Fuente de tension
\at 0 0 \P1
\- 5 d
\nl\cc \varU1 {$v(t)$} d
\- 5 d \P2

% Cables
\atpin P1
\- 6 r \P3

%Primer Resistor

\- 1 d
\nl \spring1 {$R_1$} d
\- 1 d
\.1 

%Segundo resistor

\- 1 d
\nl \spring2 {$R_2$} d
\- 1 d

%Cierre del circuito
\htopin P2

%Cables a los conectores

\atpin P3
\- 2 r \P4
\connection1 {$+$} c r

\atpin .1 
\- 2 r \P5
\cc \connection1 {$-$} c r

% Signos

\atpin varU1t \shift 0.5 0
\put{$+$}

\atpin varU1b \shift 0.5 -0.5
\put{$-$}


\atpin P4 \shift 0 -4
\put{$v_1(t)$}


\end{circuit}