tams elektronik FCS Series Manual page 36

English FCS modules
Connection of the LEDs for the flashing lights
Connect the anodes (+) of the two LEDs for the flashing lights to the
connecting points X4 and X5. Connect the cathodes (-) of the LEDs
both to the connecting point X3. Additional series resistors are not
necessary for the operation of the LEDs for the flashing lights.
Connection of the LEDs for the stop and back lights
The two LEDs for the stop and back lights have to be connected in
series, i.e. the anode (+) of the one LED has to be connected to the
cathode (-) of the other LED. Next connect the disconnected anode (+)
with connecting point X8 and the disconnected cathode (-) with
connecting point X3. Additional series resistors are not necessary for
the operation of the LEDs for the stop and back lights.
Connection of the loudspeaker
First connect the basis (B) of the enclosed transistor BC 327 to the
connecting point X6, the emitter (E) to the plus pole of the accumulator
batteries and the collector (C) to the plus pole of the loudspeaker. Next
connect the minus pole of the loudspeaker to the connecting point X1.
If the polarity of the loudspeaker is not given, you may connect it
anyway.
You can reduce the sound volume of the loudspeaker by mounting a
resistor between the collector of the transistor and the plus pole of the
loudspeaker. The resistor should have a value of 10 to 100 .
Page 36