Go Down  Topic: Simple i/o sensor to detect contact/touch (Read
1 time) previous topic - next topic   Hi all,  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   I w