The applet below can be used to find the solution of the kind of matrix equations (AX = B) which occur in circuit analysis.

The elements of the matrix A is shown in yellow and of the column matrix B in red. The element to be changed is shown in pink.

Step 1. Use the Neq scrollbar to set the number of equations.(3 to 14)

Step 2. Use the row and col scrollbars to move to the element to be entered. The element to be changed should be shown in pink. Only nonzero elements need to be entered.

Step 3. Use the c1, c2 and c3 scrollbars to set the value of the matrix element. The value is shown by the blue text at the top. Elements can be set with an accuracy of 6 figures. Negative numbers are displayed with 5 digits in yellow but are stored as 6 digits as shown by the blue text at top.

Step 4. Click the right arrow of the Lock scrollbar. The element to be changed should be updated and shown in cyan text. It is essential at this point to click the left arrow of the Lock scrollbar to return the text to pink.

Step 5. Repeat steps 2, 3 and 4 until all the matrix elements have been set.

Step 6. Click the right arrow of the soln scrollbar. The solution should be shown as the blue text at the bottom. The numbers are the solution to the variables in X and are listed in the same order as the column matrix X.

v1 = 0.398778V

v2 = -0.60121V

v3 = -4.503V

v4 = 5.86237V

v5 = 3.19033V

v6 = 8.0673V

v7 = -21.916V

v8 = -19.572V

i1 = 1.98734A

i2 = 2.18228A

i3 = 1.92596A

i4 = 0.00576238A

i5 = 0.803457A

i6 = -0.80697A

i7 = -0.16837A

i8 = -0.099337A

v1 = 0.104581V

v2 = -0.89540V

v3 = -5.2384V

v4 = 4.81643V

v5 = 0.836972V

v6 = 0.108401V

v7 = -2.8915V

v8 = -4.000V

i3 = 0.238288A

i4 = 0.865521A

Copyright © 2010 Cuthbert A. Nyack.