The standby power supply is 500mA 12 Vdc wall wart. The input supply can actually be any transformer that powers up and down with the system. The power supply for the booster is ideal for this. The relay is a 4P2T relay with a coil voltage and type to match the supply used. I use 18 vac 6 amp transformers to power my boosters, and a 24vac relay works fine.

What happens is this. When the LocoNet is powered up basically nothing, all is normal. When the system is powered down and the relay drops out  this is where things change a little. The Orange wire of the LA-1 is moved to the + side of the standby power. The Red&Green LocoNet power wires are connected to the Black&Yellow LocoNet ground wires. This causes all throttles plugged into the LocoNet to go to IDLE. This might be all you need and in that case a 2P2T relay will work. But you will also notice that it removes removes the Blue&White wires from the Booster. The original DB100s did not have the bleed resistor on the caps that the newer ones do. Without these, the standby power would charge these caps and cause the booster to sometimes boot up in reverse polarity or other strange things. So I cured this by having the LocoNet Blue&White data wires disconnect from the booster.

Lighting Effects
Ditch Lighting Using 1.5 volt 20-25 mA. lamps. Shown with ditch lights included as well as Digitrax FX CV values for blinking when F2 is pressed. Resistor values may need adjusted to supply proper current to lamps, based on your function output voltage. Which is dependent on your actual track voltage and decoder. Function voltage can be found by measuring DC voltage from Blue common to function output lead.

Regulated Lights  Two different forms of voltage regulation for 1.5 volts. Standard diode voltage drop, and using the LM317 adjustable voltage regulator to regulate multiple decoder functions.

Flicker Free Lights  Using the LM317 as above, but wired to the rails for rolling stock. Use for marker lamps, passenger cars, etc. Using a standard diode bridge rectifier, of at least  a 50 volt 1 amp rating. Also includes a constant current NiCad charger for really flicker free lighting.

Understanding Ohm's Law  How to figure what value resistor to use for current limiting with your bulbs. A very basic understanding of Ohm's Law.

Decoder Installs 
Decoder Install Primer
Decoder Tester you can build
Bachmann K-4 Pacific Steam
Bachmann F7A & B Units
Bachmann 2-8-0 Install with SOUNDtraxx
Bachmann 2-8-0 Install [PROBLEM]
Bachmann DoodleBug Install [PROBLEM]
Life-Like HO Proto 2000 GP7 [PROBLEM]
Life-Like HO Proto 2000 SD7
Life-Like HO Proto 2000 SD9
Stewart HO FT's with SOUNDtraxx

Other sites with decoder installs
 

Programming Decoders
Supported CVs and Tables, Bit masks, ect for various decoders.
The PR1 Help Page
Digitrax Mobile Decoders
Digitrax DS54 Stationary Decoders   To include a lot more info on the Digitrax DS54!
Zimo Mobile Decoders

Programming CV29
Having a problem trying to understand CV29?  Because it controls multiple decoder operations, this is understandable. Here are the controls for CV29 listed in Bit order.
Bit 0 Base Loco Direction. Off = Forward  On = Reverse. This will set which end of the loco is forward. And also set all functions to match, lights, ect. ex: do you want long or short hood forward.
Bit 1 14 or 28/128 Speed Step. Off = 14  On = 28/128. You are telling the decoder to either use the baseline 14 speed step mode or the advanced 28 or 128 speed step mode.
Bit 2 Analog Conversion. Off = no conversion On = Automatic Conversion. You are telling the decoder either to stop if there is no DCC signal or it is OK to convert to what ever the new power is, usually DC.
Bit 3 Advanced Decoder Acknowledgment. Off = disabled  On = enabled  See RP-9.2.3 for more information.
Bit 4 User Loadable Speed Tables. Off = Disabled On = Enabled
Bit 5 Two or Four Digit Addressing. Off = Baseline two digit address On = Advanced four digit addressing. CV1 stores the two digit address and CV17 and CV18 store the four digit address.
Bit 6 Reserved for Future Use. Leave Off.
Bit 7 Multi-Function/Accessory Decoder. Off = Mobile [Loco] Decoder  On = Accessory Decoder. If it's in a Loco leave it Off.

Ok now you know what all 8 bits of CV29 do. Are you still confused on how to use them, or enter them into the decoder. Do not understand a bit from a mask. Then click here to take the CV29 Primer Course.

Status Editing a Digitrax Command Station
What is a Status code, what does it mean, what is a Status code of 'FF' and what do I do to get rid of it. These are some of the most asked questions by Digitrax users. This is my attempt to answer and/or explain some of these. What is the actual Status Code. How do you Edit the Status. What is Status code 'FF', and how to avoid it.