Page 10 MS-SOUND decoders MS440 to MS990
Schematics
MS580N18
Top side (with Next18)
NOTE: External energy storage with
MS580
The “Next decoder” MS580 contains an
especially big internal capacity with
a voltage of
5 V.
The Tantal capacitors provide the sound amplifier and the
motor (only with 5 V, which is enough for slow driving) in case the track voltage is
interrupted. The internal capacity is enough for a
stay-alive
of about
1 sec
and
thereby prevents cracking noises and gets through short powerless sections.
This internal capacity can be expanded
externally
, either by
•
further Tantals of the same type (to be connected via a small wire bridge) or
by Elkos. The total capacity is NOT limited, a dielectric strength of the capaci-
tors of 6.3 V is enough, or
•
two
miniature Goldcaps connected in series (best possibility, if there is
enough room
, but it can also be put at any other place within the loco con-
nected via wires). Types with 12 x 4 mm (length x diameter) are available as
MGOGURT with 2 x 0.3 F at 2.7 V, which enable a
stay-alive
of
1-2 seonds
.
Goldcaps or Supercaps with higher energy density are to be expected in fu-
ture
.
If (for example because of the lighting) the buffer of the 5 V voltage is not
enough, but the full running voltage shall be buffered, capacitors (practically
without limitation) can be connected like to every other decoder, to “Gem.
Pluspol” (common positive), although, WITH additional components and a di-
electric strength suitable for the running voltage (at least 25 V), additionally to
the tantals described above or Goldcaps or alone:
Bottom side (with optional external extension of the stay-alive capacitor)
Stay alive time 1 - 2 sec!
Bottom side of type
MS580N18G
(WITHOUT Tantals on the decoder, but wires to the external stay-alive capacitor).
Two connected Goldcaps are delivered with the package, they should be
soldered to the open ends of the wires. OBSERVE THE POLARITY (+/-)!
