Subject:
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Re: Question about Running 12v trains
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Newsgroups:
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lugnet.trains
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Date:
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Tue, 16 May 2000 20:32:03 GMT
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Viewed:
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1464 times
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> Concerning accessories:
> I have noticed the 13v output sockets on the 7864 LEGO 12v speed regulator.
> Can that connector be used for use with 12v street lamps so they are at
> constant brightness rather than variable pick up from the electrified train
> track?
> I'm a little concerned that it says 13v, but that the lights are 12v. Oh, is
> the 13v output AC rather than DC?
The lights _should_ be fine. Esp. if you have any real length of wire between
them and the powerpack, they are not going to get 13V, in fact, they may well
not even be getting 12V.
The best way to judge is to take the lights, and (in a dark room) look at the
"color" of the light, if it is yellow then the bulbs will have a decent
lifespan, if it is white then you are running them with too much voltage. If
you are really worried about the life of them, make a converter plate from 9v
to 4.5/12V connection, and connect to a spare (9V) train transformer. (I have
spares...Email me at my freenet addy for more info)
I run my 4.5V lights using 4- 1.2V cells, giving 4.8V on the lights. I have
_not yet_ burned any out, but I know that it shortens the lifespan of the
bulbs. So, at worst your lights may burn out before there "normal" lifespan,
but I doubt it.
> Also, while running my 12v train at maximum speed I measured the voltage
> on the electricified rails: it measured over 13v. I wonder if that could
> burn out the 12v train motor?
I doubt it. I used to run the 4.5V technic motor on 54V (6 9V batteries in
series)...That moved it a little faster :). An extra volt at the terminal is
not going to translate very far given the resistance of the lego track. I
would think that within 10-20 lenghts of track most of it has disapeared into
the resistance.
James P
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Message has 1 Reply:
 | | Re: Question about Running 12v trains
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| (...) I just wanted to confirm: I totally agree with the opinion of James Powell. Light bricks might be shortened in their expected lifetime by to high voltage. With 9 V they shold last for a very long time. The Lego® motors (especially the older (...) (24 years ago, 16-May-00, to lugnet.trains)
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Message is in Reply To:
| | Question about Running 12v trains
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| For a 7864 12v train speed regulator: Went down to Radio Shack yesterday and bought a 40W 110v to 220v step up transformer. So far as I can tell 40W is just fine for running the LEGO 12v trains and accessories. The German plug on the 7864 goes (...) (24 years ago, 16-May-00, to lugnet.trains)
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