tams elektronik
English
WD-34 | WD-34.2 | WD-34.M
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 types) have a
package in form of a half zylinder (SOT-Gehäuse).
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).
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.
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