Elenco 130-in-1 Electronics Playground - Manual (Page 6)

-155-
PARTS LIST
Bar Antenna with Holder
Battery Box Plastic (2)
Capacitors
10pF, ceramic disc type
100pF, ceramic disc type
0.001
μF, ceramic disc type
0.01
μF, ceramic disc type
0.02
μF, ceramic disc type
0.05
μF, ceramic disc type (2)
0.1
μF, ceramic disc type
3.3
μF, 25V electrolytic type
10
μF, 16V electrolytic type
100
μF, 10V electrolytic type
470
μF, 10V electrolytic type
CdS Cell
CdS Holder Plastic
Digital Display PCB Assembly
LED Digital Display LT-312
PCB for Digital Display
Resistor 360
Ω (8)
Diode Germanium 1N34A (2)
Diode Silicon 1SS53 / 1N4148
Earphone, ceramic type
Frame, Plastic (L)
Frame, Plastic (R)
Integrated Circuit 74LS00
Integrated Circuit BA728
Key Switch
Knob, Tuning Capacitor, Plastic
Knob, Control, Metal
Light Emitting Diode (3)
Nut 2mm
Paper Bottom Panel
PCB for 74LS00
PCB for LM358
Resistors
100
Ω 5% 1/4W (4)
470
Ω 5% 1/4W
1k
Ω 5% 1/4W
2.2k
Ω 5% 1/4W
4.7k
Ω 5% 1/4W
10k
Ω 5% 1/4W (2)
22k
Ω 5% 1/4W
47k
Ω 5% 1/4W
100k
Ω 5% 1/4W
220k
Ω 5% 1/4W
470k
Ω 5% 1/4W
Screw 2.4 x 8mm (4)
Screw 2.5 x 3mm
Screw 2.8 x 8mm (2)
Slide Switch
Speaker, 8
Ω
Spring (138)
Transformer
Transistors
2SA733 PNP (2)
2SC945 NPN
Variable Capacitor (tuning)
Variable Resistor (control)
Washer 10mm (4)
Wires
White, 75mm (20)
Red, 150mm (30)
Blue, 250mm (20)
Yellow, 350mm (5)
Black, 380mm (2)
Green, 3M (2)
fine screen would keep rocks from falling over), which
would prolong the flow of water but not stop it
completely. Like rocks are for water, resistors work in
a similar way. They regulate how much electric current
flows. The resistance, is expressed in ohms (
Ω,
named in honor of George Ohm), kilohms (k
Ω, 1,000
ohms) or megohms (M
Ω, 1,000,000 ohms) is a
determination of how much resistor resists the flow of
electricity. The water through a pipe can be increased
by an increase in water pressure or the removal of
rocks. In a similar way you can increase the electric
current in a circuit by increasing the voltage or by the
use of a lower value resistor (this will be shown in a
moment). Below the symbol for the resistor is shown.
Resistor Color Code: The method for marking the
value of resistance on a part is by using colored
bands on each resistor. The representation of the first
ring is the digit of the value of the resistor. The second
ring is a representation of the second digit of the
resistors value. The third ring means that you to which
power of ten to multiply by, ( or the amount of zeros
to add). The fourth and final ring is a representation
of the construction tolerance. A majority of resistors
have a gold band that represents 5% tolerance.
Simply this means that the resistor value is
guaranteed to be 5% of the valued marked. See the
color chart on page 159.
Variable Resistor (Control): The variable resistor is
simply a control and this is required in many electric
circuits. The variable resistor can be used as a light
dimmer, volume control, and in many other circuits
when you are wanting to change resistance easily
and quickly. A normal resistor is shown, this contains
an additional arm contact that moves along the
resistive material and can tap off the resistance
desired.
Capacitors: Capacitors move alternating current
(AC) signals while prohibiting direct current (DC)
signals to pass. They store electricity and can function
as filters to smooth out signals that pulsate.
Capacitors that are small are traditionally used in
high-frequency applications such as radios,
transmitters, or oscillators. Larger capacitors
ordinarily reserve electricity or act as filters. The
capacitance (capacity for storing electricity) of a
capacitor is expressed in a unit known as
farad. An
extremely large amount of electricity defines the farad.
Most of the value of capacitors is predetermined in
millionths-of-a-farad or microfarads.
Electrolytic - Electrolytic are the four largest
capacitors. They are marked with an “–”. There is only
one-way to connect them to the circuit, the + and the
– wires must always go into the correct terminals.
Disc - Unlike the electrolytic above, these capacitors
have no polarity and can be connected in either way.
Tuning Capacitor: Ever wonder what that knob that
changes the stations on your radio is? It’s a tuning
capacitor. When the knob is rotated, the capacitance
is changed. This alters the frequency of the circuit,
letting through only one frequency and blocking out
the rest.
-6-
Disc Electrolytic