Auto Reverse

Hi, which one was you looking at. The Model number ? 

Thanks, John

There a a lot of ways to do it,but it takes a bit of electronics. One way is to get 2 reed switches and place them on each end of the line between the rails and glue a magnet to the bottom of the trolley. The magnet closes the reed switch when the trolley passes over it.  Using a dpdt twin coiled latch relay you can reverse the DC polarity and reverse the trolley. Each reed trips one of the coils when the train reaches the end. You can also add a conventional relay and a timer so that the trolley stops for a time at each end and also anywhere in the middle (wherever you place a reed switch). If you run the trolley at 10-12 VDC you can use the track source to also power the relays. Otherwise you need a separate transformer tap. 

Parts are maybe $25 to make up,if you want timed stops. Maybe $10 without stops.

Dale H

I was looking at Bachmann E_Z Track #44547

I have to say Dale's version is exactly how I'd approach it.

If you don't know, a reed switch can be very tiny. The size of a large piece of long grain rice.

 Normally 2 contact arms are mounted in a glass tube. One is steel and is moved by the magnet when its close.

Bachmann has had a few reversing systems, but I think they used reeds in some also.

You can also drop a magnet anywhere along the route just to change things up a bit