Although most hobbies
could count on
the interest of vast
numbers of people
not all that long ago,
times have changed
and they now attract
only a handful of faithful
adherents. One of
the more popular
hobbies was that of
model trains and this
retains a core of
enthusiasts. One of
the aspects of this
hobby that has
changed considerably
is the amount of electronic
units that is
now available to the
discerning few. This
article discusses how
digital circuits may be
used to control locomotives,
points, and
signals.
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