This post on Brass HO Trains is about Digital Control Systems. Today’s digital world has found its way to the Brass HO trains and other model trains, to make it more interesting, workable and easy to operate. The most popular control system is the Conventional 12V DC, but the Digital Command control is taking over the trend. This is because the digital systems make it possible to control all aspects of operating as a separate entity. It also uses minimal wiring, along the rails. Digital signals are sent along the rails and control most of the operations including the signals, turnouts, cranes, turntables, level crossings, etc.
The component of a typical control system include throttle, central unit, booster, locomotive decoder, stationary decoder, sound and funtion decoders, feedback bus and computer interface. Each of the component has its own function. The throttle controls the operation of the train and are also known as cabs. They are used to select the train to operate at a given time and also control the speed and direction of a train at a time. The Central unit, being the center of the whole digital system, gets the commands from throttle and sends the corresponding signal to the track so that the commands are executed by the respective parts of the track.
An integrated booster helps amplify the low-power signal that the central unit produces or limits the high current to more tolerable levels as in the case of Brass HO trains and other smaller models. In larger layouts, partition of the track into segments and each will be powered by its own digital booster. Each of these boosters is connected to the Central unit or to the next booster segment to receive the signals to be amplified.
There are two main types of decoders for the devices. The locomotive decoders are fitted inside the locomotives. It receives the command from the central unit via the booster and interprets them to the rails. Thus the changes in speed, direction, etc are sent to the motor to execute. The Stationary decoders are those that are connected to the fixed devices like signals, level crossings and turnouts. They are generally mounted under the layout, where they are less obvious. Many other types of decoders also can be placed for specific functions like controlling headlights, ditch lights and others. The PC sound cards are used as sound decoders. Many sounds of the trains starting and sounding horns are pre-recorded and they are synchronized with the movements of the train. Some decoders come as a single unit and perform the functions of the locomotive control, sound effects and also the function control.
The feedback bus is basically a sensor that keeps a track of the movements of the train and sends the information to the central unit. This knowledge helps the central unit to know when to stop sending signals and when the train has reached its destination, trigger a particular signal or close down a level crossing. Some of the central units are also connected to the computer of the collector. This way, the trains and their movements can be controlled with the help of the computer interface. The digital command control systems are one type of the digital model train control systems. However, in general, they are understood as a generic term for all types of digital systems pertaining to model trains.
Brass HO Trains