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Installing the Decoder
c) Setting the decoder output
For correct smoking action you should set the AUX output to
„Dimmer" as well as full „Brightness." More info in chapter 12.
d) Connecting the smoke generator
Most smoke generators are wired against the chassis (ground).
Therefore the smoke generator only receives current in every
second half cycle. How much power gets to the smoke genera-
tor depends on your command station and the digital protocol.
Generally, Seuthe type 11 is recommended, but it does not get
enough power and therefore does not smoke satisfactorily.
There are two options on how to solve this problem:
Solution 1: Using the Seuthe No. 10. This type is intended for
analogue operation and draws a relatively high current. Subject to
its tolerance levels, it may trigger the overload protection of the
decoder. In this case, you must wire a relay (ESU No. 51963) into
the circuit or you slightly reduce the „Brightness" of the output.
Solution 2: Using the Seuthe No. 11. Do not wire it against the
chassis (ground) but rather use the blue wire for the second pole
(„U+"). This prevents the asymmetric track signal from interfering
with the smoke generator. It represents the best solution but is
sometimes a bit difficult in terms of wiring.
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6.9.6. Connecting a wheel sensor
If you want to synchronise the stem exhaust chuff using a sensor,
you have a little work to do. LokSound decoders support several
types of sensors: Hall sensors, reed switches and mechanical wip-
ers. The most accurate result you will get when using a hall sensor
IC in combination with (up to) four magnets.
If you want to use an external sensor, you need to configure the
LokSound in such a way that it will use the sensor input. The Lok-
Sound is setup ex works to use the computed exhaust chuff.
Set CV 57 to 0 in order to tell the LokSound to use the external
sensor.
Using CV 58, you can define how many sensor pulses the decoder
has to receive before it generates a steam chuff. Set CV 58 = 1
to get a triggered chuff on each pulse the decoder receives from
the sensor. Based on the type of sensor IC you use, this may result
in double the amount of steam chuffs you want to have. In this
case, set CV 58 = 2. For values of 2 and more, every trigger pulse
the decoder counts will result in one steam chuff. This is useful for
geared locomotives.
6.9.6.1. HALL Sensor IC
A Hall sensor is an electronic circuit that responds to an alternating
magnetic field similar to a reed switch. Hall sensors are easier to
adjust since the distance between sensor and magnet is not criti-
cal. A commonly used hall sensor, that can be purchased via mail
order is the TLE4905 by Siemens / Infineon. There are also many
compatible devices on the market. The terminals have to be wired
to the LokSound as shown in figure 12.
Place four miniature magnets on the inner side of the driving
wheel in such a way that the magnet will trigger the HALL IC each
time it will pass the sensor IC.
For 3-cylinder locomotives, you may even need 6 or 8 magnets,
depending on the cylinder configuration.
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