July 2008
Intermediate to advanced
544 pages
16h 52m
English
Content preview from Computers as Components, 2nd Edition
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1.4 Model Train Controller 31
Motor Receiver
Header Address Command ECC
Message
Track
Power
supply
Console
System setup
Receiver,
motor controller
Console
Signaling the train
FIGURE 1.14
A model train control system.
1.4.1 Requirements
Before we can create a system specification, we have to understand the require-
ments. Here is a basic set of requirements for the system:
■ The console shall be able to control up to eight trains on a single track.
■ The speed of each train shall be controllable by a throttle to at least 63 different
levels in each direction (forward and reverse).