User manual

tams elektronik
SAS modules English
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). The longer lead of wired LEDs is always the anode
(positive pole).
Light emitting diodes should always be connected via a
series resistor which limits the current and prevents failure.
Rectifiers
Rectifiers convert alternating into direct voltage, they have
hardly no influence on the level of the voltage. They have
four pins: two for the input voltage (a.c. voltage) and two
for the output voltage (d.c. voltage).
The pins for the output voltage are polarized. The pin connections are
printed on the housing. As usual with wired components the longer
connecting pin is the positive pole.
Capacitors
Among other things capacitors are used for filtering
interference voltages or as frequency determining parts.
Ceramic capacitors are not polarized, for that reason their
mounting orientation is of no importance.
Normally they are marked with a three-digit number which indicates the
value coded. Number 104 corresponds to a value of 100 nF.
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