Subject:
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Re: multi train dogbone
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 14 Aug 2000 02:26:21 GMT
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Viewed:
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588 times
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On Mon, Aug 14, 2000 at 02:18:53AM +0000, James J. Trobaugh wrote:
> Dan,
>
> Very clever layout. How is the RCX deturning when to let the next train go? Is
> it timed or is it using a sensor to figure out if the track was clear. I would
> be curious to see how this worked with longer trains, ones with a few pieces
> of rolling stock.
This layout was designed as a tolly line, so it wasn't tested with longer
trains.
> The issue I ran into with my non-LEGO controled layout was the the light
> sensors were detecting the gaps between cars and assuming the the coast was
> clear when it really wasn't. So I ended up setting up parameters that said the
> the light sensor had to be clear for a selected amount of time (aprox 5s). I
> was wondering if you were able (or did) anything like this with your layout.
In this case, this was not a problem. However, in a different project,
Tom Cook designed an automated level crossing that had to deal with long
trains across multiple tracks. The solution he came up with is very similar
to yours. The light sensor had to be clear for a certain amount of time,
(I believe he set it to 1/2 a second) before the track was considered
clear. The same solution could be applied in this case, if there was a
need.
:)
Dan
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Message has 1 Reply:
 | | Re: multi train dogbone
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| (...) I've done this before in a rudimentary layout controlled by a Control Lab (8 Inputs, 8 outputs, needs a PC). My tactic was to angle the light sensor in both the horizontal and vertical planes. It looks about 30 degrees back along the (...) (24 years ago, 14-Aug-00, to lugnet.trains)
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Message is in Reply To:
| | Re: multi train dogbone
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| Dan, Very clever layout. How is the RCX deturning when to let the next train go? Is it timed or is it using a sensor to figure out if the track was clear. I would be curious to see how this worked with longer trains, ones with a few pieces of (...) (24 years ago, 14-Aug-00, to lugnet.trains)
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