Make potentiometer full volume at 180degree?

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diy1995

Member
Joined 2017
#1
Hy, is there a simple way to make potentiometer give full volume on 180degree instead of 270/300?

I want to control it with servo motor, but it`s only 180degree.
I tought of adding pream with high gain, but is there any simpler way?
Thank you
 
#2
Compared to complexity of adding a servo *motor* , adding a single fixed gain stage (as simple as 1 Op Amp and 2 resistors) is child´s play.
No High gain involved.
Just measure output at 180 degrees, say half output of full rotation value, then add 2X gain to compensate that. Easy peasy.
 
#3
Hy, thank you for anwser.
I complicated things a bit with that servo, didn`t want to add digital pot, I had enough ground loop / buzz issues with my diy amp already. Definetly I forgot to check max movement of servo before I bought servo and arduino.
Will add preamp and call it job done.
 
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