So I have two seperate parts, one top and one bottom piece, I need the bottom piece, witch is a handle, to stay still as I hold it, and I need the top part to turn 180d starting from one point and stoping at the other. I need it to be spring activated so when I push a button the top piece starts to turn and then stop. Does that make sence? Any help with a mechanism I could make or preferably buy would be great! Thanks
