Создаем свой физический компонент - Резистор

@engeemodel MyResistorHeat begin
   
    @nodes begin
        p = EngeePhysicalFoundation.Electrical.Pin(), [view = ("+", "left")]
        n = EngeePhysicalFoundation.Electrical.Pin(), [view = ("-", "right")]
    end

   @variables begin
        v = 0, [unit="V",description = "Voltage"]
        i = 0, [unit="A",description = "Current"]
    end

    @parameters begin
        R = 200.0, [unit="Ohm"]
        a = 0.1, [unit="1/K"]
        T0 = 300, [unit="K"]
        T = 300, [unit="K"]
    end

    @branches begin
        i:(p.i, n.i)
    end

    @equations begin
        v~p.v-n.v
        v ~ R*(1+a*(T-T0))*i
    end

end