model circuitRC_v1
  import Modelica.Constants.pi;
  parameter Real R = 1e4  "resistance";
  parameter Real C = 1e-6 "condensateur";
  parameter Real F = 1e3  "frequence";
  parameter Real A = 10   "amplitude";
  Real U_C         "tension aux bornes du condensateur";
  Real S           "tension aux bornes de la source";
initial equation
  U_C = 0          "conditions initiales";
equation
  S = A * sin(2*pi*F*time)   "equation de la source de tension";
  R * C * der(U_C) + U_C = S "equation differentielle a resoudre";
end circuitRC_v1;