Setting a minimum value to a volume pot?

[alex_spaceman]

Hey there,

google and the search couldn't provide me with an answer, so I'm giving it a go...!

As per the the thread title, I'd like to wire a pot to act as a volume but without it muting the signal when to minimum. I find the final half/quarter is the portion of action I find useful to fiddle with when placed in front of a buzz box-based fuzz i have on the breadboard and would love to get a pot to only control within that range of interest rather than going from zero to full on.

Thanks in advance,
Alex

[Seljer]

just hookup a resistor in between one of the either outer lugs of the pot (depending on if you want to shave off the top part or bottom part of the sweep) and where it normally connects in the circuit.
If you've got a volume control one of the lugs goes to ground, if you want to raise the minimum setting the resistor goes between the that lug and ground.

You can measure the resistance of your minimum setting and figure out the new ratios for the new voltage divider. Or you can just temporarily hook up another potentiometer in there, mess around with it till the normal volume control behaves as you want it, then replace the temporary potentiometer with the nearest resistor value.

[alex_spaceman]

Thanks for the quick reply!

So all I need to do is follow this diagram?



Off to experiment with values then. Cheers!

[seedlings]

Thanks for the quick reply!

So all I need to do is follow this diagram?



Off to experiment with values then. Cheers!

That diagram sets Minimum volume threshold.  Put the resistor before the pot to set a Maximum volume threshold.  Oh, and you can use a trim pot to dial it in.

CHAD

[DavenPaget]

He wants a minimum volume threshold .

[mayoayox]

Thanks for the quick reply!

So all I need to do is follow this diagram?



Off to experiment with values then. Cheers!

still got that diagram?

[mark2]

It should probably look like this. i.e., use a resistor to prevent all of the signal from being sent to GND.

[PRR]

still got that diagram?

If you are going to trawl decade-old posts, you want to learn to look on the WayBack Machine, Archive.org

Then put in the old link: (revealed with the Quote function here)
http://www.beavisaudio.com/Projects/DBS/Schematic_Simple.gif
Pick a year, a date, a time. (This image, it probably does not matter.)

https://web.archive.org/web/20101120131632/http://www.beavisaudio.com/Projects/DBS/Schematic_Simple.gif