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Posted by Sonnich Jensen on September 21, 2005, 1:32 pm
Here is a deep link:
http://members.chello.nl/~f.buiting/lego/trains/signal.html
> hmmm I seem to be missing a part of this thread (neti.ee server is funny)
> There were such systems once, and Frank Buiting used some of the old 12V
> systems for signaling on 9V system - they are simple.-
> http://members.chello.nl/~f.buiting/lego/
> Basically you cut a piece of the rail, e.g. 1 mm in 2 places, so you get a
> separeted area, and put up a switch to turn it off and on (keep in mind
that
> multiple cuts can cause other problems, such as totally "dead" areas).
> Signals can be made of bricks and leds. Puzzeling a little bit with
> electronics (switches, leds, resistors aere some wires are all one needs)
> and you have signals.
> Automated points are a bit harder, but it _is_ possible to use the old 12V
> systems to control 9V points, but will will have to modify them. As Jacok
> says, check www.lugnet.com
> Automated level crossings and other stuff is possible to, once they
existed.
> But they can still be made using a bit of electronics:
> The "bom" (correct English????) can be made of bricks, but the sensor can
be
> made the same way - cut a small part or a rail, e.g. leave a small lenght
(1
> cm) free - connect the "outer" parts, and use the separated part as a
> sensor - the point is, that the engine will supply power when it crosses.
> Using a diode bridge, and some stuff (e.g.. octocoupler), one has a signal
> (2 times as there are 2 wheels) when a train passes. Some more electronics
> might enable a small timer or something, which simply makes a red led
> flash - a simple crossing.
> S
> > Carl Gibson wrote:
> > > 9V Lego trains are pretty cool, but I would love to see Lego
> > > introduce electric switching rails (or "points" in UK :) ) and
> > > electric lighting etc like they had when 12V trains were around.
> > I remember to have seen some solutions to that problem on Lugnet. I
> > think there was both one which used one of the small red 9V motors and
> > one which used pneumatics.
> > Play well,
> > Jacob
> > --
> > Bison (building instructions):
> > http://lego.jacob-sparre.dk/Dyr/Bison/
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> introduce electric switching rails (or "points" in UK :) ) and
> electric lighting etc like they had when 12V trains were around.