A multi-story, callable elevator tutorial
For more specific instructions + prize, see the tutorial level : http://lbp.me/v/4cznbp
Thought I'll share this small nugget of knowledge with you. Basically, what I'm going to tell you is how to build an elevator that can be automatically called at will to any floor of your choice. Surprisingly, I haven't seen too many elevators of that kind.
The trick lies in the direction controller. When you press a button/otherwise choose a floor, a tag activates in the destination. The direction follower (a physical rod w/ a spring bolt and a tag follower chip) turns to point towards the tag as much as it can, causing it to hit the corresponding physical trigger (piece of material w/ a touch sensor, connected to a selector, which controls the direction of the piston), determining the direction where the cab should go.
After the cab arrives to the destination, another, very precise tag sensor is activated by the floor tag, stopping the elevator to the correct spot. Pure and simple :)
Tell me what do you think :p