Electronics Electronics Principles & ApplicationsPrinciples & Applications

Eighth EditionEighth Edition

BreadboardingA Presentation

by

Charles A. Schuler

author of

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.

The front side of a breadboardBuses

Group of 5

The back side of a breadboard

Metal strips

Metal strips

Continuity

No continuity

ContinuityNo continuity

No continuity

How the groups and buses work

1 k

560

470

Series circuit

+

+

1 k560 470

+

Parallel circuit (with a common mistake)

+

.47/

63VCC

VCC

In

Out

In

Out

Breadboarding a transistor amplifier

.47/

63VCC

VCC

In

Out

In

Out

Is this also correct?

Previous slide

Double check the pin numbers when working with ICs.

1 7

814

VCC

A digital circuit

Pull-up

Current limit

VCC

Observepolarity!

A

A C

C

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.

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Breadboarding has largely been replaced by circuit simulators.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.