Capacitor charge

[fifa]

Hi,

Can anyone help me to design a VI that can be used to show how the voltage rises across a capacitor in a simple RC circuit when excited by a step function.

The output from the VI will consist of two plots displayed on one XY graph. One plot will be the input wave V_in = Eu(t) (V) displayed from t = -10 (ms) to T1 (ms) The second plot will be the voltage across the capacitor V_C = E(1 – e ^-t/RC) displayed from t = 0 to

t = T1 (ms)

The VI will run continuously allowing all inputs to be varied.

The inputs to the VI will perform the following functions:

1. Set the number of points for the V_C plot, default 100.

2. Set the final time T1 in (mS) default 50 (mS).

3. Set the resistor value in (Ω) default 500 (Ω).

4. Set the capacitor value in (μF) default 20 (μF).

5. Set the height of the input step function default 10(V).

The outputs from the VI will display the following:

1) The Time Constant T = R.C

2) The two plots on an XY graph as specified above.

[jgcode]

Hi,

Can anyone help me to design a VI that can be used to show how the voltage rises across a capacitor in a simple RC circuit when excited by a step function.

Hi Fifa

Is this a homework assignment?

[Saverio]

Yes. http://forums.ni.com/t5/LabVIEW/capacitor-charge/m-p/1333008

Confirmed by professor who actually gave out the assignment.