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1987-07-07
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3.0 Input of circuit
================
Circuit elements are input from the New circuit Menu, one element at a time
with the required information being the element type, the connecting nodes
and the value of the element, (i.e., 10 Ohm, .1 Henrys, etc.). The first
thing that must be done is to number the nodes. A node, for the purposes of
this program is any point where two ore more circuit elements meet. The no-
des must be consecutive integers, consecutive numbered nodes need not have
any special topological relationship to each other.
While inputting each element, the program will ask for the connecting nodes
with the following question: NODES: FROM, TO?. The FROM node is the node
where the current leaves the element.
For the non-source elements (resistors, inductors and capacitors), it is
not important if you don't know the direction of the current flow. Simply
assume one. If you assume wrong, the current will be computed 180 degrees
from the expected direction.
Study the example's EX1.CIR and EX2.CIR.