Recommendations for limit switches for Arduino I'm looking for a limit switch to use with the Arduino. In my project I want to count how many times my turntable makes a full 360° rotation. An object (wheel, pipe, whatever) will be sticking out the side of the turntable and when it comes in contact with the limit switch that will be right next to the turntable, it should notify the Arduino.

Any suggestions on which limit switch I should get?

Thanks so much in advance!
A $2 microswitch with a roller would be OK for a million revs or so.



You would put a little ramp on the diameter and use it to trigger the switch.

Non-contact magnetic or optical could be better for more cycles or faster operation.