the trial and error required when using voltage dropping resistors. Due to evolving decoders and
all types of decoders. It also in- cludes all popular decoder con- nectors, including the new 21-pin interface. When programming is com-
plete, power the decoder from the accessory DCC booster system (such as the Tam Valley unit) and set appropriate functions on and motor output. The decoder is not polarity sensitive. Local control of a decoder can be controlled by a toggle switch interrupting input power. Likewise, a function out- put can also be controlled locally in the same way. After the decoder is properly functioning, no additional ac- tion is required. It will remember its current state when power is turned off and power back up in the same situation when power is restored.
Decoder changes after installation I found that sometimes it is
desirable to be able to change a decoder effect after installation. By using operations mode pro- gramming (OPS) mode or pro- gramming on the main (POM) on your DCC system, a decoder set- ting can be changed or modified. Again, this requires ensuring each decoder address is unique and doesn’t duplicate a locomo- tive address.
General Comments and Observations Remember, many decoders can adjust power level to light
function outputs along with a LED versus incandescent lamp selection. Building and outdoor illumi-
nation levels can be varied by decoders with variable voltage output functions or the motor output. This eliminates much of
1
2 3
4 5
6 7 8
9
(w/fade in on some decoders)
Firebox Strobe Light headlight
the fact that some of the decod- er requirements are only rec- ommended by the NMRA, it is impossible to predict how each manufacturer’s decoder will perform on an alternate power source. Keeping the decoder on a DCC bus guarantees proper op- eration. Using one of the decod- er testers mentioned along with JMRI DecoderPro, each decod- er can be programmed, tested, and implemented on the layout readily. I continue to marvel at the
power of DCC. This approach of- fers yet another creative avenue for the use of older DCC decoders for new applications.
Effects: Application: Dimmable
lamps, etc.
Simulating
Fire The steam locomoti ve fi rebox fl ame simulator makes a great campfi re. — Joe Hedl photograph
DCC
Decoder
Outputs This table shows a few common DCC decoder outputs and how they can be used to animate your layout. Various de- coders will have various eff ects; you should check the decoder documenta- ti on to learn what eff ects are supported.
Adjustable individual lamp intensity for structures, street Campfire, welder, structure fire, etc.
television and radio towers. Other applications are in alarm systems, theatrical lighting (most notably to simulate light- ning), and as high-visibility running lights. They are still widely used in law enforcement and other emergency vehicles
Rotary Beacon
signal. Applications include industrial process control indi- cation and warning, vehicles such as vans and trucks, visual warning in areas where audible warnings might be difficult to hear, used as part of fire and security systems.
Prime Stratolight Ditch Light Blinking light Mars Light
duced a warning light that sequenced four lamps sequentially. Santa Fe and Burlington Northern railroads used them on their locomotives in the late 1970s and early 1980s.
This refers to a particular manufacture, Prime, which pro-
Any application requiring alternate flashing of two lamps (or LEDs) such as a grade crossing flasher.
effects. Classic flashing lamp used for general purpose warning
States and built by Mars Signal Light Company for railroad locomotives and fire apparatus. Mars Lights used a variety of means to cause the light to oscillate vertically, horizontally, or both to catch the attention of motorists and pedestrians.
Mars Lights are signal-safety lights used in the United Gyra Light 10 FRED 11 Steam Exhaust Chuff
12 Diesel Engine 13 Bell
14 Steam Horn, Etc. Whistle/Diesel
15 Adjustable voltage high current power supply
(motor output)
The Gyra Light is similar to the Mars Light, but is slower in motion. It was made by The Pyle-National Company.
eral warning light. The flashing rear end device (FRED) can find use as a gen-
steam engine applications either synchronized via a cam input or non-synchronized using auto chuff.
Steam sound decoders can be used for simulating non-rail
ing bell and other stationary warning applications. Need to test
Diesel sound decoders can be used for stationary engines. Sound decoder audio output can be used for a grade cross-
Rotating beacons are an alternative to a flashing warning Anti-collision lighting on tall stationary objects, such as
supply for a structure of layout area to adjust lighting for de- sired intensity. Variable speed control on motors for animation (including turntable control).
Decoder motor output can be used as a variable voltage
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