This applet allows you, the user, the opportunity to interact with Electrical Networks in a graphical manner. The order with which you enter nodes is very important. Always enter boundary nodes first in some sort of circular order.
Boundary nodes are blue and interior nodes are green.
Continue entering conductances in the box and clicking on 2 nodes until you have made all desired connections. You can display information such as node ordering and the conductivites of the current network by clicking on the appropriate checkbox. You can construct a rectangular lattice network by choosing the appropriate choice from the drop-down menu and then entering the number of rows and columns you desire. The maximum dimensions are 13x12. The solution exists and is unique.