PROJECT ARTICLES by Fred Miller, MMR
The below listed articles are provided in Adobe® .pdf format. Click on the Article title to download the project article.
Draft
Book - All About Digitrax
Sound Decoders
This text offers a description of the Digitrax Sound decoders and explores details about their modification and use. Sound file replacement as well as development of full replacement sound projects (SPJs) is discussed. The author's SPJHelper software manual is included as an addendum. The .pdf copy of the text can be downloaded from here.
Sounds for Traction Modelers
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Generic Traction Sounds: This article describes the use of the Digitrax DCC SFX sound decoders to provide custom sounds. The discussion is based on the otherwise unavailable traction (trolley and interurban) sounds. The referenced TRACTION V1.SPJ sound project for Digitrax Sound Decoders is available without charge. Just click on the above SPJ filename to start a download or email your request. A sample .wav file demonstrating the available sounds in the project is available to download here.
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Peter Witt Streetcar Sounds: This article describes a new Digitrax DCC SFX Sound Project support of sounds for the Bachmann HO Peter Witt Streetcar. The project file PETERWITT.SPJ is available without charge. Just click on the above SPJ filename to start a download or email your request. A sample .wav file demonstrating the available sounds in the project is available to download here
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Several
different Sound Projects are available for PCC Streetcars. The
projects are available without charge. Just click on the applicable SPJ filename to start a download or
email
your request.
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A combination (both Pre and Post War cars) DCC SFX Sound Project PCCSET.SPJ is available in one project. The user can select which sound set with a CV setting (CV60-Scheme). The sounds and performance are the same as the below individual projects.
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Air (Pre War) PCC Streetcar Sounds: This DCC SFX Sound Project PCC-I.SPJ supports sounds for an Air PCC Streetcar such as the Con-Cor HO PCC car. A sample .wav file demonstrating the available sounds in the project is available to download here
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All-Electric (Post War) PCC Streetcar Sounds: This Digitrax DCC SFX Sound Project is available in two versions, both supporting sounds for an All-Electric PCC Streetcar such as the Bowser HO PCC car. The project file PCC-II.SPJ is compatible with the use of a MTS M4T motor decoder while PCC-III.SPJ is more general and is suitable for the Digitrax SDN144 combination motor/sound decoder or a Digitrax SoundBug and any other motor decoder. A sample .wav file demonstrating the available sounds in the project is available to download here
SPJHelper Development Software
This program was developed as an aid in the construction of "Sound Projects" for the Digitrax SFX sound decoders. The program operates in two modes: one for simple non-technical design of Sound Projects, and the other for the experienced programmer wishing to use easy access to the necessary tools. A FREE Version of the latest SPJHELPER software can be accessed from here.
General Purpose SFX Decoder Sound Player
This article describes a Sound Decoder Project which provides a flexible tool to play layout background sounds on Digitrax SFX sound decoders. Three different voices can be initiated by DCC Throttle Function Keys, CAM switch inputs and automatic timed delays. The SPJ file to load into a decoder can be downloaded here.
SFX Sound Decoder to Amplifier Interface
This article describes a circuit to enable playing Digitrax SFX Sound Decoders through an external amplifier, for example, powered speakers for PCs. or the line-input on a PC.
SFX Sound Decoder CAM Debouce Circuit
The CAM input to a Digitrax SFX Sound Decoders can be more useful than just the steam engine "chuff." This article describes a circuit to "debounce" the input for useful triggering of other decoder functions.
Make your own Miniature Plug Sets
This article describes an easy and inexpensive way to make your own miniature plug and socket sets. These are particularly useful for connections to onboard decoders.
Design and Construct Custom Trackwork.
This article describes a technique of designing custom track work using a PC for developing plans and templates for construction.
Movable Trolley Wire Frogs for Freight Switching Operations.
This article describes an approach to build trolley overhead which enables "back-polling" into sidings with trolley freight equipment.
Modifications to DCC Throttles for test track.
This article describes modifications to the Digitrax DCC UT-1 throttle to enable automatic DCC locomotive reversing on a test track or other configuration requiring automatic changes in direction.
This article describes a simple and inexpensive circuit for automatic locomotive reversing on a test track or other configuration requiring automatic changes in direction. Although designed for DC controlled locomotives, it can be used with DCC and a modified UT-1 throttle (See above article)
This article describes the construction of a circuit which provides a timed pulse to the Kadee under-track electric uncoupling ramp.
Speed Modifications to Digitrax BD-1 Detector modules
This article describes modifications to the Digitrax BD-1 DCC detector module to speed up the ON and OFF reaction time to less than a second.
This article describes the construction of an inexpensive circuit to cause an LED to flicker to simulate a fire or welding torch.
This article describes a modification to the Fire Flicker Circuit which can be used to randomly light 1 to 8 lamps as in house lighting, etc.