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Instrumentation Laboratory Exercise 5
A breadboard (protoboard) shown in Figure 1- 2) is a device for
prototyping electronic circuits in a form that it can be easily tested
and changed. Figure 1- 3 illustrates a typical breadboard layout. The
the five holes in each half column (for example, row a through e) are
interconnected as shown in the figure. The lower half column (f
through j) is also interconnected, but is not connected with the upper
half column. The + and – rows that lie along the top edges of the
breadboard are also connected.
Figure 1- 3 also shows you how to construct a simple resistor circuit.
The schematic of the circuit is shown in Figure 1- 4. Push the
components legs into the appropriate holes on the breadboard to form
the circuit. You may run the components directly to the 5 V or
ground (GND) line if they require connection (rather than using a
separate wire for the connection as shown in the diagram). Also on
more complicated circuits it may be convenient to trim the
components legs slightly so they sit closer to the breadboard, rather
than allowing them to “float up in the air”. This will reduce the
possibility of accidental short- circuiting of component legs.
NOTE
• Always use the red wire for +5 V and the black wire for GND (0 V).
• To distinguish signals lines always use a different color for signals (for
example, white or yellow).