Data Sheet

Green
light-emitting
diode
Item No. 708802
Transistor (npn)
Item No. 708800
Phototransistor
Item No. 708803
Sound-
Generator (IC)
Item No. 708804
Speaker
Item No. 708805
Resistor,
1 kilohm (1 kΩ)
Item No. 708806
Resistor,
8.2 kilohms
(8.2 kΩ)
Item No. 708807
Component Qty. Description Appearance
It lights up green when current flows
through it.
The transistor is a fundamental electronic
building block. It is hidden inside of elec-
tronic devices or computer chips, some-
times by the thousands. It serves as an
amplifier or electric switch, and will play
an important role in your experiments. It
has three terminals — it’s important not
to mix up the different terminals!
This component reacts to light: It lets
electric current pass through more or less
easily, depending on illumination.
This red-orange-colored building block
produces various kinds of noises,
because it has dozens of transistors
inside its housing that work together in a
complicated manner.
It turns signals from the sound generator
and a few other things into sounds you
can hear.
Resistors allow you to regulate the flow
of current. They come in various electri-
cal values, indicated in “kilohms” (kΩ).
Careful, always insert the resistor with
the indicated value!
This is just like the 1-kilohm resistor,
except this one offers 8.2 times the
resistance to the current.
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1
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