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In lugnet.trains, Ross Crawford wrote:
> I'm not saying it's impossible, just that it isn't as easy as it might sound.
> For instance, I would probably work out a few critical points on the layout, and
> place an RCX at each, making sure it gets good coverage of all trains going past
> (assuming "blind" running is possible). It would also allow time "gaps" where
> I'm not directly talking to trains, so I can use IR to talk to other RCXs, but
> it may not be easy to place them for best train coverage and still be able to
> communicate with each other. I'm sure these problems are not insurmountable, but
> it's gonna take some dedication to get it to work right in a show situation. I
> would also need sensors to tell me when a train was going past, and logic to
> know when there *should* be one - now I'm running multiple trains, my "network"
> needs to know when there's been a derailment, otherwise my emergency rescue figs
> are gonna start complaining of overwork ;)
You've also got the problem that if they work like the volume control on a TV
remote (which is likely) the signals are "speed up" and "slow down", not
absolute speed values. Since you have no way of knowing whether the train
received a particular signal or not, you have no way to tell what speed it is
travelling at.
Jason Railton
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In lugnet.dear-lego, Jason J. Railton wrote:
> In lugnet.trains, Ross Crawford wrote:
> > I'm not saying it's impossible, just that it isn't as easy as it might sound.
> > For instance, I would probably work out a few critical points on the layout, and
> > place an RCX at each, making sure it gets good coverage of all trains going past
> > (assuming "blind" running is possible). It would also allow time "gaps" where
> > I'm not directly talking to trains, so I can use IR to talk to other RCXs, but
> > it may not be easy to place them for best train coverage and still be able to
> > communicate with each other. I'm sure these problems are not insurmountable, but
> > it's gonna take some dedication to get it to work right in a show situation. I
> > would also need sensors to tell me when a train was going past, and logic to
> > know when there *should* be one - now I'm running multiple trains, my "network"
> > needs to know when there's been a derailment, otherwise my emergency rescue figs
> > are gonna start complaining of overwork ;)
>
> You've also got the problem that if they work like the volume control on a TV
> remote (which is likely) the signals are "speed up" and "slow down", not
> absolute speed values. Since you have no way of knowing whether the train
> received a particular signal or not, you have no way to tell what speed it is
> travelling at.
Agreed, and even if your RCXs can tell each other "I sent XX speed signals to
the train" there's no guarantee it received them. I would be surprised if the
control doesn't have a "stop" button though.
ROSCO
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