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Electronics Electronics Principles & ApplicationsPrinciples & Applications
Eighth EditionEighth Edition
BreadboardingA Presentation
by
Charles A. Schuler
author of
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Buses
Buses
Groups of 5
Groups of 5
Four separate buses and 48 separate groups of 5 are shown here.
Strip #22 solid wire 1/4 inchto 3/8 inch on each end.
Many components havecompatible leads.
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The front side of a breadboardBuses
Group of 5
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The back side of a breadboard
Metal strips
Metal strips
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Continuity
No continuity
ContinuityNo continuity
No continuity
How the groups and buses work
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1 k
560
470
Series circuit
+
+
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1 k560 470
+
Parallel circuit (with a common mistake)
+
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.47/
63VCC
VCC
In
Out
In
Out
Breadboarding a transistor amplifier
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.47/
63VCC
VCC
In
Out
In
Out
Is this also correct?
Previous slide
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Double check the pin numbers when working with ICs.
1 7
814
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VCC
A digital circuit
Pull-up
Current limit
VCC
Observepolarity!
A
A C
C
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General guidelines:
• Do not force wires larger than #20 gage. Add soldered extensions using #22 solid wire.
• Use an IC removal tool or use a screwdriver to carefully pry up ICs for removal.
• Use buses for power and ground distribution.• Add bypass capacitors to power buses.• Check and recheck before applying power.• Cut off ends and re-strip jumpers when they are worn.• Do not breadboard high power, high current or high voltage circuits.• RF circuits usually won’t work properly, if at all.• Keep high gain circuits inline and avoid long jumpers.• Adapters are available for SMT devices.
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You can’t breadboard SMT devices? Right? Wrong? You can, for some devices, but you will have to mount them on an adaptor or solder them to an adaptor such as the one shown below.
Breadboarding has largely been replaced by circuit simulators. Not for education, though. For learning the basics, the ability to make one’s own connections and then experience the results is still a very valuable endeavor.