Plot a graph of the loading and unloading of a capacitor in MATLAB

Question

I need to create a program that shows through Plot the loading and unloading of a capacitor as shown below:

There are 3 constants where the user needs to enter the values: C = capacitance; R = resistance E = source voltage (example; a source of 20v);

I was able to chart the load through this code:

Answer 1

If you want to make the theoretical graph just continue in the same way that started, asking for the values and showing the figure for one and the other case. You can show the result in the same figure or separate figures. I recommend using a time t dependent on the value of Tau. A capacitor fully loads/unloads at 5*Tau, so the following code shows figures always adjusted to Tau value.

C = input ('Digite o valor do condensador (em uF): ')
R = input ('Digite o valor da resistencia (em Ohms): ')
E = input ('Digite o valor da fonte de tensao (em V): ')

C = 10^-6
Tau = R * C;

t = linspace (0,5*Tau,100); %100 amostras de 0 a 5*Tau segundos

figure (1)
hold on
% carga do capacitor
plot (t,E*(1-exp(-t/(R*C))),'b-')

% descarga do capacitor
%figure (2)  %para graficos separados descomente essa linha
plot (t,E*(exp(-t/(R*C))),'r-')