controlling a potentiometer with arduino

I've seen a lot of components that come with a knob.

Is it possible to remove the knob and do that function with the arduino?

Or no removing the knob and control it somehow with the arduino?

Regards

Paging Rube Goldberg to the customer service desk. Rube Goldberg to the customer service desk, please.

What kind of devices with knobs do you want to control? How? With a servo, maybe?

There are digital potentiometers that can be used in place of potentiometers with knobs, where the actual resistance is controlled by a digital signal that the Arduino is capable of outputting.

Is it possible to remove the knob and do that function with the arduino?

Sure, remove the knob from the device and the Atmega328 from the Arduino. Then glue the 328 to the pot shaft, pins down so it's more comfortable to grasp. :)

Sorry, couldn't resist.

As mentioned you could use a servo although it's very difficult to imagine why you would, unless you want to simulate those cool mixing decks where the manual controls move by themselves.

I've seen a lot of components that come with a knob. Is it possible to remove the knob and do that function with the arduino? Or no removing the knob and control it somehow with the arduino? Regards

The arduino can control various things. It can control a servo or stepper motor that may be able to rotate the knob of which you speak. You fail to provide information as to what the knob actually does, so no recomendation on that. Note that if it is a pot do a google search for digital pot, motor driven pot, and resistor bridge to see some potential solutions.

A potentiometer can be used in two ways, either as a variable resistor (two pins used) or as a variable voltage divider (3 pns used).

If the pot you want to control is wired as a variable resistor it is easy to replace it with a digital potentiometer, IF IT DOESEN'T HANDLE HIGH CURRENTS.

If it is a voltage divider things get more hairy.

So to cut a long story short, you need more information than just seeing a pot.

How is it wired ? Which voltahe and current levels is it controling ? How many Ohms ?