Electrical engineer here. I'm looking to build an incredibly simple mechanism that in my mind involves kind of a pulley. Below is a diagram.
So it's essentially like a mechanical servo. I would like to be able to pull something, and cause another body (attached to an arm) to rotate. However, I don't know what kind of mechanism or part I need.
I want to build this. And I'm talking real simple here - like household items (popsicle sticks!) or hardware store (though I do have access to a 3d printer).
Any ideas would be thoroughly appreciated!