[Reppert7]

Hi everyone.... i know this is a random question, but I'm building my own PKE meter, i want working twist knobs which i have, but i don't have the back part to them that holds them and makes them work....ive been searching on google and i can't find where to buy them or what they're even called. can anyone help please?!?! thank you!!

[grogking]

Do you have a picture? Maybe someone could 3d print what you need.

[CountDeMonet]

It sounds like you are talking about the electrical component that the knob connects to. If so it's a Potentiometer

https://en.m.wikipedia.org/wiki/Potentiometer

The size and type really depends on your application. We would need to know more about your setup. I buy components like this on Amazon or digikey

[Reppert7]

It sounds like you are talking about the electrical component that the knob connects to. If so it's a Potentiometer

https://en.m.wikipedia.org/wiki/Potentiometer

The size and type really depends on your application. We would need to know more about your setup. I buy components like this on Amazon or digikey

yes exactly!! thank you so much!!!