- This topic has 7 replies, 3 voices, and was last updated 7 years, 4 months ago by Greg Schubert.
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July 20, 2017 at 11:48 pm #22446Sean CollinsParticipant
So I’ve been thinking a lot about this automatic train switcher since we started talking about it because of the winter display thing. So now I want to build it. My problem is i dont own a 9v train set. So my question.. would anyone be willing to work with me on this by supplying me (obviously more of a borrow thing) a 9v train set with at minimum of 4 track switches. In the mean time I’m going to start working on the layout, programming, and getting a 3rd nxt brick (since the 1st i had got from some one was broken -_- ). The other nxt brick is would handle train switching exclusively for up to 4 trains (maybe more if i do a binary system) but in the mean time the one working one i have will have to do. hahaha
July 21, 2017 at 5:19 pm #22457Sean CollinsParticipantso this is what im came up with so far
- This reply was modified 7 years, 5 months ago by Sean Collins.
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You must be logged in to view attached files.July 21, 2017 at 6:01 pm #22461TimModeratorAs a practical matter, one usually wants to avoid having a turn out immediately after a curve. The trains (at least 9-v) tend to bind up and have difficulty maintaining momentum. It usually is a good idea to have at least 2 pieces of straight track after the curve before another curve or turnout.
July 21, 2017 at 6:18 pm #22463Sean CollinsParticipantThe layout is really just concept as im unfamiliar with the Lego train system 9 volt 12 volt battery operated any of them
July 23, 2017 at 3:43 pm #22468Greg SchubertParticipantThe layout of 9V track can be tricky, and I am sure there is lots of advice online about what to do and what not to do, ex.
I personally do not know for certain whether different sections of the track will be energized / de-energized by throwing the switches.
Also, I cannot tell whether a particular configuration will result in a short circuit, even temporarily while the switches are being moved, if the pairs of switches (before and after each length of track) are not moved at precisely the same moment.
I would seek out advice online from a LEGO train forum. Someone has probably solved many of these problems already.
July 23, 2017 at 5:28 pm #22469Greg SchubertParticipantHere is an idea for a switching mechanism.
Would you need a sensor to know when one train has come in for some down time so you could release a fresh train?
July 23, 2017 at 7:17 pm #22470Sean CollinsParticipantWould you need a sensor to know when one train has come in for some down time so you could release a fresh train?
In the program I account for a switch system to check when trains have docked. As soon as the current train laps 5 times the 6th time it triggers itll start the docking process. Each time the systems switches track the system will cut the power to the line and repower once the switch has been completed. The only issue i have is i dont own a 9v track to test and tweek the program on. As far as everything else I already own what i need for a working prototype.
July 30, 2017 at 2:09 pm #22553Greg SchubertParticipantI am willing to try out the train switching stuff with you … next week, because I’m getting ready for / attending brickfair this week.
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