19: In this view the commissary building is in place over the
access hatch.
with the switcher throttling up, then running for a short
while, and back to idle. The idle section is long enough to
extend beyond the three-minute duty cycle. Now all I had to
do is get the MP3 player back to the beginning of the track
each time the locomotive starts.
I came up with a simple low-tech way of accomplishing this.
Since the current reverses each time the locomotive starts, I
connected the track to a Tortoise switch machine. Each time
the locomotive starts, the Tortoise switch machine moves
from one side to the other. I put a magnet on the end of the
switch actuating wire. Every time the switch machine moves,
the magnet moves over a reed switch which sends the MP3
player back to the beginning of the track.
Feed Mill:
The speaker for the Peterson Feed Mill (Decatur,
Arkansas), will be located within the yet-to-be-constructed
19
