Re: [Help-gnucap] Simple Capacitor Charging Simulation

[a r]

Make sure the capacitor is discharged at t=0.

Simple Capacitor Charger
V1       1  0   pwl (0 0, 1m 50V)
C1       2  0   10uF
R1       1  2   100kOhm
.print tran V(2)
.op
.tran .5 10
.end


On 8/1/07, Crispy <address@hidden> wrote:
> Hello,
>
> I'm trying to model a simple capacitor charging circuit by monitoring
> the voltage across the capacitor over a period of time.  The test
> circuit would have a 50V DC supply, connected in series with a 100kOhm
> resistor and a 10uF capacitor.  The time constant for this should come
> out to be 1 second, so I think monitoring the voltage across the
> capacitor every 1/2 second for 10 seconds is reasonable to show the
> principle.  Here's the netlist I'm using:
> --------
> Simple Capacitor Charger
> V1       1  0   50V
> C1       2  0   10uF
> R1       1  2   100kOhm
> .print tran V(2)
> .op
> .tran .5 10
> .end
> --------
> When I run it with the command "gnucap -b ./capacitorcharge.ckt", I get
> this data:
> --------
> Simple Capacitor Charger
> #
>  27.
> #Time       V(2)
>  0.         50.
>  0.5        50.
>  1.         50.
>  1.5        50.
>  2.         50.
>  2.5        50.
>  3.         50.
>  3.5        50.
>  4.         50.
>  4.5        50.
>  5.         50.
>  5.5        50.
>  6.         50.
>  6.5        50.
>  7.         50.
>  7.5        50.
>  8.         50.
>  8.5        50.
>  9.         50.
>  9.5        50.
>  10.        50.
> ---------
> What's wrong with the netlist or command that makes it do this?
>
> Thanks a lot,
> Chris
>
>
>
>
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