Subject:
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Re: Finally...
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Newsgroups:
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lugnet.trains
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Date:
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Fri, 23 Nov 2001 06:03:53 GMT
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Viewed:
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681 times
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James Powell wrote:
>
> > I have a couple questions regarding the decoders... Manly in regards to
> > the 'Functions' available. I understand that you have a break van setup
> > that uses these functions? What decoder did you use in that model?
>
>
> DN121's.
>
> > Is the DN121 only lights with no functions? (This is unclear on their
> > web site) I want to get into DCC with some simple converted motors,
> > (Just the motor and the standard light AUX output) and a couple of
> > special models with 5 total functions (Including directional lighting)
> > [It could be trimmed to 4 functions. Leaving out the cab interior
> > lighting ;-)]
>
> I'm using the light outputs as functions. I'm _not_ going to come out and say
> that it is a good idea...the F outputs are rated at 125mA, whereas a stalled
> lego motor draws ~650mA. So, there IS a risk of burning out the decoder...I'm
> willing to take that risk, but would say that you have to make your own
> judgement as to the risk.
>
> As far as # of functions, the 2nd number indicates the # of functions. So, a
> DN121 has 2 functions (forward and reverse light). Dependant on decoder, these
> can be decoupled from the track. (IE, you have to choose them on and running)
> As for the rest of the functions, there are 6 useable codes really, since
> #3(IIRC) is reserved for a bell function on the decoder (not always fitted, and
> you can use it for whatever you want...).
From what I've read on the digitraxx web site the DN121's lights are NOT
controllable. They just come on when the train moves and does auto
directioning.
> If you are willing to trim out the cab lighting (you can run it as a direct
> feed off the track...it has constant voltage), then that would save you a fair
> chunk of change. The choice of decoder IS going to be affected by how much
> load you are planning to put on the functions...I would NOT want to have a
> motor running for long periods of time on the F outputs of a N decoder...the
> 125mA is too little, IMO, for safe long term operations. (you are NOT limited
> to Digitrax decoders, it might pay to do some investigating...or, perhaps Calum
> can speak up here :)
That sounds scary... Damn... I wonder what the largest decoder would be
that would fit in the motor before you have bring the whole mess
external. (Like my Mindstorms Train Motor)
> >
> > Looking at the DN and DH series decoders it seems that the DN are 'less
> > featured' but smaller versions of the DH versions?
>
> N or H or O indicates the conventional scale that the decoder "should" fit
> into. (there is a Z one too...). It is more a indication of how miniturized
> the decoder is, than the features (which are best found from the digitrax web
> page, IMO-however, I think there is a error on the DN121 bit...it only has 2
> functions, not 4...)
From what I've read on the site (and it's not totally consistent) that
the DN121's are STD*'s that don't have any controls for the lighting.
You have to go to the DN142 or DH series.
> I've got to come visiting :) Send me a Email as to when you (VanLUG) are
> having a meeting-I need at least a week notice though, because I need to get a
> weekend leave pass to leave Victoria now...just in case...
Sounds good. We have a month long display at Lansdowne mall for the
month of December. With our last show of the year with our layout on the
Dec 15/16 Weekend. We'd love to have you 'help out'. :-) More in email.
Dean
--
Dean Husby
LUGNET Member #320
TFM's LEGO Workshop - http://www.akasa.bc.ca/tfm
The Vancouver LEGO Club - http://www.akasa.bc.ca/vlc/
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Message has 1 Reply:
 | | Re: Finally...
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| (...) Nope. You can turn the output on/off, but which one of the 2 is selected is dependant on direction (you have 2 discrete outputs, but can only get them on when the motor is going in the right direction, and then you action F0). So, the brakes (...) (23 years ago, 23-Nov-01, to lugnet.trains)
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Message is in Reply To:
| | Re: Finally...
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| (...) DN121's. (...) I'm using the light outputs as functions. I'm _not_ going to come out and say that it is a good idea...the F outputs are rated at 125mA, whereas a stalled lego motor draws ~650mA. So, there IS a risk of burning out the (...) (23 years ago, 23-Nov-01, to lugnet.trains)
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