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Subject: 
Re: "No Contact" Homebrew Train Sensor for Mindstorms
Newsgroups: 
lugnet.trains, lugnet.robotics, lugnet.org.us.nelug
Date: 
Tue, 5 Dec 2000 19:50:17 GMT
Viewed: 
1649 times
  
In lugnet.trains, Larry Pieniazek writes:
In lugnet.trains, Eric Kingsley writes:
In lugnet.trains, Chris Phillips writes:
As has already been reported by others, I built an automated railroad
crossing for the NELUG train display at last weekend's Greenberg show.  I
wanted to take a moment to describe the "homebrew" sensor that I used to
detect an approaching train so that others might benefit in their own
layouts.

I might just add that while this was a bit over my head it work extremely
well and the sensor itself was very small and unobtrusive.  It was a non-LEGO
solution but I loved it and recommend it.

I think with some reworking it may even be possible to hide the sensor
in/under one of the ties themselves.

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 it...

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 get some then.

For now I will try and give you an idea of where it was located.

This is the crossing and the sensor is below the Caboose (you can see the
wire).

http://www.nelug.org/greenberg120300/PIC00028.JPG

Now we only had the sensor for the last day so that limits the number of
pictures it could be in.  I am pretty sure someone was taking a close up at one
point though.  Anyone?


Eric Kingsley

The New England LEGO Users Group
http://www.nelug.org/



Message has 1 Reply:
  Re: "No Contact" Homebrew Train Sensor for Mindstorms
 
(...) I just looked through my pictures and I was surprised to find that I don't have any that show the sensor. I will snap a few close-ups tonight... I also like the idea of doing a more formal write-up with pictures, schematics, and part sources. (...) (24 years ago, 5-Dec-00, to lugnet.trains, lugnet.robotics, lugnet.org.us.nelug)

Message is in Reply To:
  Re: "No Contact" Homebrew Train Sensor for Mindstorms
 
(...) 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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