Subject:
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Re: GMLTC Update
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Newsgroups:
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lugnet.trains
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Date:
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Sat, 20 Jul 2002 23:16:48 GMT
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Viewed:
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831 times
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In lugnet.trains, John Gerlach writes:
> In lugnet.trains, John Kelly III writes:
> > James-
> >
> > Mr. Gerlach is quite clever. He has the loop powered in three sections with
> > light sensors to grab the trolley location for the RCX. It was working
> > alright at the Roundhouse, but it had some trouble in the direct light of
> > the Fargo show. The light sensors were just overwhelmed.
>
>
> I need to invest in some reed sensors to detect the magnets as they go by,
> the light sensors are just too unreliable under the different lighting
> conditions. Anyone know a good place to purchase some RCX-compatible reed
> sensors?
>
> "Clever"... Ha! ;-)
>
> JohnG, GMLTC
Fairly easy to make your own:
1. Cut a 1m cable in half.
2. Take one half and shorten one of the two wires at the end by two inches.
3. Solder a reed switch to the ends so it lies along the cable.
4. Put some heat shrink over it all.
5. Scrape/file/melt the middle 8 studs off a 2x6 plate.
6. Epoxy the switch onto it.
7. Mount it lengthways across two sleepers, or centered on one sleeper of a
curve.
8. Check a train motor can just clear it.
Some people like to put a series resistor on it, but I've never had any
trouble with just a switch.
Jason J Railton
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Message has 1 Reply:
 | | Re: GMLTC Update
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| (...) You make it sound so easy... <grin> Do you have to orient it a certain direction? Knowing my luck I'd install it upside down or something... JohnG, GMLTC (22 years ago, 22-Jul-02, to lugnet.trains)
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Message is in Reply To:
| | Re: GMLTC Update
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| (...) I need to invest in some reed sensors to detect the magnets as they go by, the light sensors are just too unreliable under the different lighting conditions. Anyone know a good place to purchase some RCX-compatible reed sensors? "Clever"... (...) (22 years ago, 19-Jul-02, to lugnet.trains)
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