What switch can be pressed from both directions?

[Ether]

Originally Posted by yonisav

To lift the totes up and down we have a system that goes up and down.

To regulate it's hight, we want to create "levels". a level for the height of 0 totes, a level for the height 1 tote and so on

You could buy a string potentiometer and connect it to one of the roboRIO's analog inputs. That would tell you the exact height of your lift at any point.

Or if your lift is powered by a motor, you could attach a KoP encoder to a shaft to measure angle. A simple calculation converts the angle to lift height.

You could even use the measured height, along with the proper software, to make the lift go to a commanded position (so the driver doesn't have to manually guide it).