User manual

tams elektronik
FCS modules English
Light sensitive resistors
Light sensitive resistors change their value depending on the ambient
lighting. As a rule types are used which value decrease with increasing
light intensity. Their mounting orientation is of no importance.
Trimm-potentiometers
Trimm-potentiometers (abrv. "trimm-pots") are resistors
which allow the value of resistance to be varied and that
way to be adapted to the particular demands. In the middle
they have a small slot into which a small screwdriver can be
put in order to vary the value of resistance. The maximum
value is printed on the housing.
Diodes
Diodes allow the current to pass through in one direction
only (forward direction), simultaneously the voltage is
reduced by 0,3 to 0,8 V. Exceeding of the limit voltage
always will destroy the diode, and allow current to flow in
the reverse direction. The diode type is printed on the
package.
Diodes must be mounted in a given direction. The negative end is
marked with a ring.
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 cathode (-) has to be connected to the neagtive
voltage. With wired LEDs the longer wire is the anode (+).
With SMD versions the cathode (-) is marked (bevelled
edge, colour marking or similar).
Light emitting diodes should always be connected via a series resistor
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