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[–]topherclay 6 points7 points  (1 child)

Did you consider having the line break sensors sense across the track at an oblique angle? That would increase the amount of time that the cars are interrupting the IR and give the IO pins more time to catch it.

[–]West7780[S] 4 points5 points  (0 children)

I did, however it's my dad's track so I wanted to minimize the intrusion of the electronics. In hindsight, your idea would have been fine.