Basically I am trying to build a slot car race track with an arduino with some modifications. I have a timer and I want the time to print when the "car" reaches the finish line. The "cars" will be traveling at extremely slow speeds and only weigh a few ounces.
I am looking for a simple sensor that sends a signal to the arduino when said sensor is touched; so when the "car" crosses the finish line. In theory I think that I can use a force sensor but I really don't want the analog values and feel that the varying numbers could cause more issues then needed because this will be moved a lot. So is there some conductive pad or other preferably inexpensive sensor that could be like an on/off (touched/not) value that can be passed through? Note again that the weight applied will only be a few ounces.
Thanks for any help! Been rattling this around for a while and want to open it up for more solutions