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Discussion Boards => HO => Topic started by: nelsonb111563 on December 25, 2017, 11:46:32 AM



Title: Bachmann Sound Value function outputs?
Post by: nelsonb111563 on December 25, 2017, 11:46:32 AM
I know the SV boards are bare bones boards from Soundtraxx but it seems like the F5 and F6 functions are active as I think the can be remapped.  My question is:  There are what appears to be solder pads on the underside of the decoders.  Are these function output pads possibly for testing purposes at the factory and if so would they support a function output to drive two SMD LEDs?


Title: Re: Bachmann Sound Value function outputs?
Post by: RAILSPLITTER on December 29, 2017, 01:25:37 PM
No ,unless you have a dda40x or a e7 sound board. I checked this before there are 2 light functions . Front and rear headlight can be remapped for independent control so 1 function can be mapped to the headlght and one to I BELIEVE FUNCTION 1 .Then you have to remap the bell. CV 57 AND 58 do the deed,but  cv 33 and 34 will also have to be changed . This way you can wire another LED to the headlight for the rear light and use the 2nd function for something else separate controll of the headlight.I found this playing around and noticed some factory Tsumani equipped diesels use cv 57 and 58 . They are there on the sound value boards ,but not listed  because cv 33 and 34 are used. So the software is there ,but the hardware for a actual light function for functions 5 ad 6 are not. Go to the Soundtraxx and look at the tsumani manuals for these 4 cv's. Then do some trial and error and look at the mapping chart. Cant remember ,but cv 57 or 58 was set to 4 maybe. It was a low number less then 5 .

Jon


Title: Re: Bachmann Sound Value function outputs?
Post by: 645diesel on December 31, 2017, 12:21:17 AM
so i am trying to hook up ditch lights base on your explanation i am still not certain if they can be hooked up.not sure where to hook wires to for ditch lighting?


Title: Re: Bachmann Sound Value function outputs?
Post by: RAILSPLITTER on December 31, 2017, 08:21:44 PM
Wire the rear Led to the output for the front light as the front light is. Then wire your front ditch lights to the rear light output for power and function. Map and program the functions so that the rear output turn on and of the ditch lights .You are limited to function 1 or 2 ,but function 1 is easier . Then you remap the bell since it was on function 1 . You can make them, your ditch lights flash ,but not flash side to side and with proper programming can flash when the horn is blown for grade crossing effect. I did this on a first run Bachmann es44ac after installing 0402 led's in the dummy ditch lights. You are using LED's? I hope.
Jon