Subject:
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Re: how does a bar code reader work?
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Newsgroups:
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lugnet.robotics, lugnet.trains
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Date:
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Thu, 30 Dec 1999 14:55:46 GMT
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Viewed:
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1624 times
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In lugnet.robotics, Guido Heunen writes:
> I want to use the rcx to detect different trains by fixing a bar code under
> the engine and wagon chasis. With this, I hope to redirect trains to another
> track, stopping at stations, changing train composition etc...
I just realized that I answered your barcode question without considering what
you were trying to do! For your application you can use (or invent!) any
barcode system you like. In fact, something simple like POSTNET (used in the
US to add a machine-readable version of the zipcode to most mail) would work
fine.
Instead of barcodes you could tag each car with a different value of resistor
and use a custom sensor to brush up against the resistor leads and identify the
car.
Also, where do you get LEGO 9v track and switches at prices which don't send
you to the poorhouse? I'd love to have a large LEGO train layout but the track
is prohibitively expensive...
--Ben
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Message has 2 Replies:
 | | Re: how does a bar code reader work?
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| (...) track (...) Well, I have for the time being a lot of 12V track, with automatic points and stop signals. I am not going to buy 9V points before they are automatic. I hope that TLG gets into train-mindstorms (computer controlled track e.g. (...) (25 years ago, 30-Dec-99, to lugnet.robotics, lugnet.trains)
| | | Re: how does a bar code reader work?
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| (...) track (...) Simple...it takes time :) I have @500 straights, and probably 200 curves, plus 16 points of 9v, plus some 4.5V stuff on my current layout. A lot of the track is in the ramp up, with about 225 pieces between the ground and the 2nd (...) (25 years ago, 30-Dec-99, to lugnet.robotics, lugnet.trains)
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Message is in Reply To:
| | how does a bar code reader work?
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| Hi, Can someone explain me how the bar code reader of the codepilot works. I figured out the basics, but I can not get to the clocking stuff. You can move either slow or fast over the bar codes to program the codepilot. I want to use the rcx to (...) (25 years ago, 30-Dec-99, to lugnet.robotics, lugnet.trains)
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