OK, I am building a racetrack for a local boys club for pine box derby.
I have all the dimensions and such that I must adhere to, and I am
trying to add a little local flavor to the deal by building a finish
line that will register which lane won. Nothing electrical, just a trip
of some kind that will throw up a flag (or even turn on a light, yeah, I
know that's electrical) indicating which car crossed the finish line first.

Anyone ever done this and if so, how did you do it. I have my ideas,
but would like to hear others before I start on that part. I have to
have it done by the first week of May.

--
Robert Allison
New Braunfels, TX