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This is a UK system, however there are few UK based forums for modellers. <br />The choices for sensing are basically reed switches, or infrared. I know about using track circuits which can detect trains without using sensors, which I think is what you are referring to, but these would not be feasible with my current electronics knowledge. The system is also intended to be for straight runs only, not dealing with junctions. As this is a school project, I am unfortunately forced to spend large amouts opf time doing things like isomeric box designs and evaluations with brilliant presentation, rather than spending time designing the system. I am also limited to 20 hours practical work, including building a circuit box. I intend to post the design work and circuit designs on the interent when I am finished. <br />Thanks for your help. I now have about 15 replys. <br />JP.
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