BASIC ELECTRONICS - OD1633 - LESSON 1/TASK 2
c. Redrawing a Complex Circuit.
Figure 57, view A, on the following
page, shows a complex circuit that may be redrawn for clarification in the
As you redraw the circuit, draw it in simple box-like
form. Each time you reach a junction, a new branch is
created by stretching or shrinking wires.
Step 1: Start at the negative terminal of the voltage source. Current flows
through R1, to a junction and divides into three paths; label this junction
Follow one of the paths of current through R2 and R3 to a junction
where the current divides into two more paths.
This junction is labeled
The current through one branch of this junction goes through R5 and back to
the source--the most direct path. Now that you have completed a path for
current to the source, return to the last junction, (b). Follow the current
through the other branch from this junction.
Current flows from junction
(b) through R4 to the source.
All the paths from junction (b) has been
traced. Only one path from junction (a) has been completed. You must now
return to junction (a) to complete the other two paths. From junction (a)
the current flows through R7 hack to the source. There are no additional
branches on this path. Return to junction (a) to trace the third path from
Current flows through R6 and R8 and comes to a junction.
Label this junction (c). From junction (c) one path for current is through
R9 to the source. The other path for current from junction (c) is through
R10 to the source. All the junctions in this circuit have now been labeled.
The circuit and junction can be redrawn as shown in figure 57 (view C). It
is much easier to recognize the series and parallel paths in the redrawn
d. Effects of Open and Short Circuits.
Earlier in this topic, the
terms open and short circuits were discussed.
The following discussion
deals with the effects on a circuit when an open or a short occurs.