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In lugnet.org.ca.rtltoronto, Larry Pieniazek wrote:
> In lugnet.org.ca.rtltoronto, David Koudys wrote:
>
> <snip>
>
> Regarding reverse loops and DCC I seem to recall that it's possible to
> automate them so you don't have to cut gaps that the motor has to coast
> across
>
> See this track diagram
>
> http://members.shaw.ca/sask.rail/dcc/loop.html
>
> Then consider what would happen if you had a sensor to detect which way the
> train was entering, which operated the switch (if necessary) shown in the
> diagram to align the loop portion correctly.... then while the train was on
> the loop section, the switch was thrown again (reversing polarity on a
> running DCC controlled motor will NOT cause it to reverse direction) and the
> train exits with never a "shorted out across the gap" opportunity.
>
> Surely a clever roboticist could do this in all LEGO. Especially if you had a
> motorised switch anyway... the "detect which way the train was entering"
> could be the same as "throw the switch to control which way the train enters"
>
> In fact maybe someone already wrote about this here and I forgot?
>
> see also: http://www.hobbylinc.com/htm/mrc/mrcad520.htm but that's non LEGO.
> sort of defeats the point of the RCX DCC, ne? and
> http://jdb.psu.edu/nmra/dcc-faq.html which discusses things to avoid if you
> want your controllers to live longer. In fact there are lots more good
> reading articles via google:
> http://www.google.com/search?q=DCC+reverse+loop&hl=en&lr=&ie=UTF-8&oe=UTF-8&start=10&sa=N
> (where I found all these)
>
> Hope that helps, sorry if it's a little vague
Urp, in the below, when i posted it before, none of the urls are clickable!
Sorry about that. And "snip" inside angle brackets IS clickable.... I'm
confused.
XFUT admin.nntp...
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