 | | Train sensors —Ross Crawford
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| | | Has anybody come across a consistent way of sensing the presence of a LEGO train on a specific section of track? I was just wondering, cos I came across (URL) this site> and thought it'd be fairly easy to create controllers like these with RCXs (...) (21 years ago, 28-Aug-03, to lugnet.trains, FTX)
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| | | | | Re: Train sensors —Brian B. Alano
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| | | | | Reed switches have been used. One discussion: (URL) a discussion on various applications: (...) (21 years ago, 28-Aug-03, to lugnet.trains)
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| | | | | | | Re: Train sensors —Chris Phillips
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| | | | | | (...) have an 18-inch electrical lead and contain an internal resistor to protect the reed switch from excessive current in case it is inadvertently wired up to an RCX motor output. The sensor can be attached to the railbed of any straight piece of (...) (21 years ago, 28-Aug-03, to lugnet.trains)
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| | | | | Re: Train sensors —Amaury Jacquot
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| | | | (...) there is one trick you can use to get this to work reliably. The thing you need is to use carbon spray on the wheels so that a resistor of a few M-ohms is created. This will draw enough current for the detector circuit to work. product is (...) (21 years ago, 28-Aug-03, to lugnet.trains)
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