Subject:
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Automated RT - Acceleration with RCX
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Newsgroups:
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lugnet.trains
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Date:
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Sat, 2 Dec 2000 21:07:55 GMT
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Viewed:
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803 times
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Hello,
I don't have any 9V trains; but I'll probably be geting the 4561 (Blue
Express Railway) for either Birthday or Christmas (December birthdays
suck!). Anyway, I'm really fascinated with ATO and subway/metro/rt
technology...
I've come up with a 3-station layout.
###
------------||-----------||----------------||--------
/ ---------||-----------||----------------||---/ ###
| / ###
| | Station B Station A
| |
- -
- -
| |
| |
|/
|
|#
|# Station C
|#
Where:
# - Platform
-------||------
track \-insulator
So... I've got an eastbound/westbound track. Station A, B, and C would all
be connected to one of three outputs on the RCX. I'll figure out sensing
later. The sections of track between the stations, which are insulated from
the stations themselves (I'm assuming it's possible to isolate sections -
how might I do that?), would be powered via a speed regulator at some
constant voltage. Ideally I'd have two trains (although that's a little ways
away; I'll likely just start up with one and see how that goes), so let's
start at Station A.
RCX Output A would accelerate the train, by presumabally ramping up the
power output (from 0-7) at some spaced time interval between the PWM level
shifts. A snesor would say "ok, we've cleared the platform and the train is
on the powered section". Train proceeds on the Westbound track to station B.
On reaching station B's block, a sensor begins the PWM rampdown to
decelerate the train, and stop it at at that platform for some dwell. Chime.
Accelerate train, travel until cleared of station B block onto the
continuous voltage section... and into terminus at Station C.
Here, the train would stop, dwell, chime... then leave. Spring switches? Can
that be done with 9V? I'm hoping so... because that'll simplify the
direction change sequence.
So I guess I need... jeez, 8 of those clips that go from the 9V connector to
the rails. Are those available separately as a S@H item?
This'll be a lot of fun if I can get this running, I'm sure. I guess the
main question I have is how nicely do the 9V motors run with the RCX? How
are other people doing acceleration/deceleration curves?
Iain
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Message has 2 Replies:
 | | Re: Automated RT - Acceleration with RCX
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| (...) Your idea sounds similar to something Tom Cook and me worked on a while ago. Take a look at : (URL) had a simpler setup though - 1 track, to be used for 2 way traffic, and two stations. We also wanted to run 3 trains, so one train had to be (...) (24 years ago, 2-Dec-00, to lugnet.trains)
| | | Re: Automated RT - Acceleration with RCX
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| (...) The best type of sensor for this is the mindstorm light sensor with a LEGO light. You put the light sensor on one side of the track and on the other side put the LEGO light. (LEGO Light package #5310 cost 5.5 at S@H) For best result use a 1x2 (...) (24 years ago, 3-Dec-00, to lugnet.trains)
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