Found this in me travels

[Why me]

http://members.shaw.ca/Villy.Madsen/ might help out others

 

[ezdays]

Good find Mike,:thumb: very helpful stuff there. That hasn't been up that long either.

 

[tetters]

Call me slow. What would you do / need this for?

 

[woodone]

The output could be used for turnout control, signals, or computer interface, would be
my guess. Very reasonable cost for train detection.