Subject:
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Re: Even more Wow!! for your buck!!! was Re: Woo Hoo!!!!! (part deux...)
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Newsgroups:
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lugnet.org.ca.rtltoronto, lugnet.trains
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Date:
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Mon, 2 Jun 2003 04:23:29 GMT
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Viewed:
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259 times
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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
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