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Awilda
Melendez
EdTec 561 Fall Semester 2003-2004 |
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The
Breadboard
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Segment
1: What is a breadboard?
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by
Awilda Melendez
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| VIDEO | AUDIO | |||||
| Still
picture of a lab station showing equipments and a breadboard |
NARR:
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Every
time anyone does a design, he or she must build a prototype to test
the product before it is manufactured on scale. |
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Breadboard close-up
or pointing at the breadboard |
NARR: |
One of the tools we have on the lab to test a prototype is the breadboard. |
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| Still
image of a breadboard top view and overlay graphic pointing out block,
holes and a wire. A wire will appear inserted. |
NARR:
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The breadboard or prototyping board allows you to assemble electrical circuits to perform tests and measurements. It consists of a rectangular plastic block and rows of holes. The holes enable you to insert wires, hold them on place and insulate from each other. | ||||
| Still
image of a breadboard bottom view pointing out a strip. |
NARR:
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Under the plastic or holes, there are metallic strips. They form an array that interconnects the holes around which you can build the circuits. | ||||
| Still image of a metallic strip. Overlay image pointing out a finger. |
NARR:
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A
metallic strip or conductor is the heart of the breadboard. It is
made of nickel silver and consists of pairs of fingers or clips. Under
each hole, there is a pair of fingers. A socket strip usually has
five pairs of fingers to connect components. |
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| Still
image of a breadboard bottom view pointing out the strips. |
NARR:
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Also there are bus strips that usually have 25 contacts or clips to distribute power and ground voltages. | ||||
| Still
image of a breadboard top view showing strips location. Image overlay
shows wire sizes and component leads. |
NARR:
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The
breadboard is a combination of socket and bus strips. Help us keep the breadboards in good condition. Please use only solid wire with gauge number 22, 23 or 24; only insert one straight wire per hole; never insert too large component leads. |
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| Still image of a breadboard top view with two interconnected resistors. |
NARR:
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Breadboarding is an art. It takes time, practice and experience. | ||||
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Produced
by Awilda Melendez at the Department of Educational Technology,
San Diego State University Instructor: Bob Hoffman © 2003 by Awilda Melendez. All rights reserved. |
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