Table of Contents
Advertisement
RCD-2
Light emitting diodes (LEDs)
When operated in the forward direction the LEDs light. They
are available in several different versions (differing in colour,
size, form, luminosity, maximum current, voltage limits).
Light emitting diodes should always be connected via a
series resistor which limits the current and prevents failure.
Transistors
Transistors are current amplifiers which convert low signals into
stronger ones. There are several types in different package forms
available. The type designation is printed on the component.
Transistors for a low power rating (e.g. BC and BS types)
have a package in form of a half zylinder (SOT-package).
Transistors for a high power rating (e.g. BD types) have a
flat package (TO-package), which is in use in different
versions and sizes.
The three pins of bipolar transistors (e.g. BC and BD types)
are called basis, emitter and collector (abbreviated with the
letters B, E, C in the circuit diagram). The three pins of the
field effect transistors (e.g. BS types) are called "source",
"gate" and "drain" (abbreviated with the letters S, G, D in
the circuit diagram).
Integrated circuits (ICs)
Depending on the type, ICs fulfil various tasks. The most
common housing form is the so-called "DIL"-housing, from
which 4, 6, 8, 14, 16, 18 or more "legs" (pins) are
arranged along the long sides.
ICs are sensitive to damage during soldering (heat,
electrostatic charging). For that reason in the place of the
ICs IC sockets are soldered in, in which the ICs are
inserted later.
English
Page 17
Advertisement
Table of Contents
