In this video it looks like most sparking occurs as the subway is accelerating as it's pulling out of the station and then lessens quite a bit once the train gets up to speed. https://www.youtube.com/watch?v=aJs4myD4kEo GRJ's idea of using a reed switch to trigger an LED would work great if a magnet was mounted on each car and a reed switch at each LED, or a strip of chasing LED's in a home made third rail with one reed switch to activate the strip. OK, Stan, GRJ and all the rest of the electronic geniuses of OGR forum, I know when you guys put your heads together you create electronic miracles. On the subway modeler's Christmas wish list is one foot long sections of third rail with chaser LED's. Wouldn't that be a cool product to manufacture. We can plant the seed here. I've seen chasing Christmas lights and often wondered how they work. Is there a circuit in the plug or does each bulb trigger the next bulb? I also found the video I first saw a few years ago that "sparked" my interest. LOL https://www.youtube.com/watch?v=xTeRa9gR3uU
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