Index – Elenco 130-in-1 Electronics Playground User Manual

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Antenna: This cylindrical component with a coil of
fine wire wrapped around it is a radio antenna. If
you’re wondering what the dark colored rod is, it’s
actually mostly powdered iron. It’s also known as a
“Ferrite Core”, which is efficient for antennas, and
used in almost all transistor radios.

Transformer: Did you know that if you were to wrap
two wires from different circuits around different ends
of an iron bar, and if you were to add current in the
first circuit, it will magnetically create current in the
second circuit? That’s exactly what a transformer is!
Transformers are used to isolate parts of a circuit, to
keep them from interfering with each other.

If the iron bar in a transformer were allowed to rotate,
it would become a motor. However, if a magnet within
a coil is rotating then an electrical current is made;
this is called a generator. Those two ideas may not
seem important but they are the foundation of the
present society. Pretty much all of the electricity used
in this world is generated by huge generators, which
are propelled by water pressure or steam. Wires
transport energy to homes and businesses where it
will be used. Motors are used to convert the electricity
back into mechanical form so that it can be used to
drive machinery and appliances.

Speaker: Did you know that electral energy is
converted into sound through a speaker? By using the
energy from an AC electrical signal it creates
mechanical vibration. Sound waves, which are

created by variations of vibrations and then travel
across the room. When you hear a sound it is actually
your ears feeling the pressure from the air vibrations.
To operate a speaker a high current and a low voltage
are needed, so the transformer will also be used with
the speaker. (A transformer can convert a high-
voltage/low current to a low-voltage/high current).

Similar to the speaker, is the earphone. It is movable
and more sensitive than the speaker, otherwise they
are the same. The earphone you will be using is
efficient as well as lightweight and can be used
without taking away too much electrical energy from
the circuit. Sound wise you will be using the earphone
for weak sounds and for louder sounds the speaker
will be used.

Batteries: The battery holders that are used in this
kit are constructed to hold six (6) “AA” batteries. These
batteries will be the supplier of all the power used in
your experiments. When you connect the wires to the
batteries make sure that you only connect the
batteries to terminals noted. Terminals 119 and 120
provide 3 volts while terminals 119 and 121 provide
4.5 volts. Be aware that parts can be damaged
(burned out) if you connect too much voltage (you can
get up to 9 volts from the connections to the batteries)
Be sure to make battery connections the right way.

Caution: Make sure your wiring uses the correct
polarity (the “+” and “-” sides of the component)! Some
parts can be permanently damaged if you reverse
polarity.

INDEX

We’ve added this listing to aid you in finding
experiments and circuits that you might be especially
interested in. Many of the experiments are listed two,
three, or four times - since they can be used in many
ways. You’ll find some listed as entertainment-type
circuits, even through they were not organized that
way in the sequence of projects. However, you may
find some of these same circuits to be good for other
uses too.

Do you want to learn more about a specific type of
circuit? Use this Index to look up all the other uses
and applications of any specific circuit - then turn to
those and read what we’ve told you in each one. You’ll
find by jumping back and forth and around, you often
will pick up a lot more circuit details than just by going
from one project to the next in sequence.

Use this Index and your own creative ability and we
know you will have a lot of extra fun with your Lab Kit.

BASIC ELECTRONIC CIRCUITS AND
COMPONENTS

Capacitors:

6, 11, 12, 16, 17, 19, 21,
27, 50, 51, 64, 69, 119,
130

Diodes:

29, 31, 34, 79, 91, 101,
102, 105, 121

Integrated:

34, 70

Multivibrators:

48, 50, 56, 90, 91

Resistance:

2, 10, 12, 18, 21, 25, 60,
74, 77, 78, 94, 102, 114,
120, 123, 126

Set / reset:

58, 59

Timing:

Transformers:

129

ENTERTAINMENT CIRCUITS

Alarm:

58, 63, 66, 92, 93, 105,
107, 116, 120, 123

Audio Oscillators:

Buzzin:

56, 57, 92, 107

Code Transmitter:

110

Electronic Cat:

Grandfather Clock:

Machine Gun:

Metal Detector:

123

Metronome:

3, 91

Motorcycle:

Musical:

3, 5, 102

Persistence of Vision:

Radio:

8, 10, 11, 38, 109, 110,
111, 112, 113, 114, 117,
118, 123, 124

Rain Detector:

120

RF Signal Tracer:

118

Shot in the Dark:

Siren:

2, 14, 15, 87, 88, 89, 90,
93

Sound:

1, 2, 3, 4, 5, 6, 8, 10, 11,
12, 14, 15, 19, 22, 49, 52,
54, 55, 56, 57, 58, 59, 63,
64, 66, 72, 87, 88, 89, 90,
93, 102, 103, 105, 108

Strobe:

Timer:

54, 55, 78, 99, 107, 108,
119

INTEGRATED CIRCUIT PROJECTS

Amplifier:

22, 70, 71, 72, 73, 74, 75,
76, 77, 78, 79, 80, 81, 82,
85, 86, 91, 92, 94, 95, 96,
97, 100, 104, 106, 122

Amplifier Uses:

22, 72

IC Radio:

109

LED DISPLAY

LED Display:

13, 16, 18, 20, 23, 24, 25,
26, 29, 30, 31, 32, 62, 83,
84, 98, 106, 116

Logic:

25, 29, 30, 31, 34, 37, 84,
98