I want to put an oval loop on my layout for a trolley. It will have 3 trolley stops. The trolley will always go in the forward direction. I want it to stop at each trolley stop for about 15 seconds. Being an old EE with Square D Co., I could probably rig something up with a homemade limit switch and a timer but there must be some much simpler electronic control available. My electronic knowledge is limited. Would appreciate any info I can get.
Thanks much,
Jim
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The MTH or Lionel infrared track device should work very well for what you want to do. I have used these with insulated track sections where I want the trolley stop and once set up it is pretty foolproof. You can adjust time delay time if you want the stops to be varied.
Ed
1. Is it acceptable to remove track power from the entire loop whenever the trolley stops?
2. Is is acceptable to use isolated-rail detection of the stopping points? Or is external sensing like the ITAD sensors ekaz mentions preferable?
3. As an "old EE" is rigging up something part of the fun/challenge...or do you just want an off-the-shelf everything-comes-in-one-box solution?
Dallee Electronics has some interesting Trolley control devices. We used a Dallee system on The Fort Pitt Hi-Railer modules with good results. They work with the basic conventional trolley control. Forward, neutral, Reverse.
Click on the underlined phrase to link. There are PDF install instructions with diagrams. 
Look at the trolley control module by Z-stuff.
I believe it will do what you want. It also has
station announcements if you choose to use them
Mine works great...
MTH Trolley cars with PS2 and PS3 can be programmed for stops.
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