 | | Re: NELUG participates in December 2nd and 3rd Greenberg Show.
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(...) used. I was nice to see some validation of using 4 baseplate wide tables. My table will be the same except my individual modules will be 2x4 baseplates square instead of 4x8. I'm hoping to transport the modules with the Lego on them, and I (...) (24 years ago, 5-Dec-00, to lugnet.general, lugnet.org.us.nelug, lugnet.trains, lugnet.loc.us.ma)
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| | Re: Are 9V trains alive?
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(...) I hope youre right. I would like to see more kind of points, and a return to the first 9v train models (and some 12V models where great too !). I hate those new models (4560/4561 & 4559). I bought some for the pieces but i don't build them. (...) (24 years ago, 5-Dec-00, to lugnet.lego.direct, lugnet.trains)
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| | Re: "No Contact" Homebrew Train Sensor for Mindstorms
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James, Are they directly wired to the RCX or is there a resister in series. BTW where is the web page on the electrical specs of the RCX and home brew sensors? I can't remember. SteveB (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)
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| | Re: "No Contact" Homebrew Train Sensor for Mindstorms
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Chris, Another great little sensor for train detection, via Radio Shack, is the little photo sensors they sell. I put them inside of a 2x4 technic plate and then snap them face up on the track. This way they use the omni light from the room as the (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)
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| | reed switch w/2^n series resister
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Chris If I understand correctly you can add a series resister to each reed switch using the formula r=2^n*R. Where n is the number of each switch (1,2,3...) and R is some resistence value that is friendly to the RCX. This way you can add several (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)
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| | Re: "No Contact" Homebrew Train Sensor for Mindstorms
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(...) This is a great idea. I will talk to Chris about it and we can try and document it with pictures on the NELUG site. Eric Kingsley The New England LEGO Users Group (URL) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)
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| | Re: "No Contact" Homebrew Train Sensor for Mindstorms
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(...) I know I didn't get a close up because my camera stinks for close ups. I think Chris may have gotten some but he hasn't uploaded his pic's just yet. If we don't have one now, we are having a meeting in a couple weeks and we will make sure to (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics, lugnet.org.us.nelug)
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| | Re: "No Contact" Homebrew Train Sensor for Mindstorms
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(...) 1) take a section of straight track. 2) take a light gray 2x4 plate and place it so that it spans the 2-stud gap between two of the ties. 3) imagine a very thin silver piece lying on that. That's it. Most of the people I talked to about it (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)
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| | Re: "No Contact" Homebrew Train Sensor for Mindstorms
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Wonderful info! If I could be so bold... On the PNLTC web site we have articles that discuss various building and other techniques. This reed switch discussion and design review would make a great article (with some pics & schematics) for NELUG! (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)
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| | Re: "No Contact" Homebrew Train Sensor for Mindstorms
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(...) Is there a photo that clearly shows the sensor in a fairly tight closeup so that it can be judged how obtrusive/invisible it is? I skimmed through many of the photos posted by you, Dave, and Tim but did not see one, although I may have missed (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics)
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