I want to apologize first as I'm a beginer in electronics and my question might sound stupid.
I've started experiencing with my Arduino Uno (I love it!) and I wanted to start a project. However, I'm missing a key component and I'm not sure it even exists.
Basically, I want to create a sort of Knob that would be robotized. I want to be able to move it to a specific position (exactly like a Servo motor) but be able to manually turn the knob and that my arduino sense the difference.
I had some ideas, for example using a potentiometer with a step motor, but I'm not certain it's the best idea. I tried a regular Servo motor but I don't think they are meant to be "manually overriden" as it's really hard to do and there is no way to read the new position. Ideally, the solution has to be really precise and inexpensive.
Any suggestion would be greatly appreciated! Thank you in advance and hurray for an Electronics stack exchange site! :D