Blog Post Actions
Group Actions
Engagement
  • Author Author: alanarnoldguitars
  • Date Created: Date Created
  • Views 334 views
  • Likes 1 like
  • Comments 2 comments
Related
Recommended

Digital guitar.

alanarnoldguitars

So, here's the thing !

Electric guitars, with humbucker pick ups, would usually have 500k ohm analog pots.

I want to go over to digital pots, that control the analog signal.

But ! I can't find 500k ohm digipots !

250 k ohm I've found, and then a jump to 1M ohm.

Anyone know where 500k ohm digipots are to be found?

Or how 250 k ohm or 1M ohm could be used, with extra circuitry?

Also. Guitar Tone controls use a simple, single capacitor to ground low pass filter.

Can I do the same even if it's a digital pot, as long as the signal is analog ?

The purpose is to be able to "snapshot" the settings, and save into a micro controller, for recall at the press of a button.

Thanks in advance .

Alan Arnold Guitars.

  • Alan,

     

    You could use a 1M ohm digital pot and limit its ability to select all of the available taps (just 128 of the 256), yielding you a 500K pot.  Either that, or you could place a 1M ohm resistor in parallel with a 1M ohm pot and have the equivalent of a 500K ohm pot.  Are you planning on a pair of up/down buttons to adjust the pot?  Are you planning on having a display to show the setting value?

     

    Good luck,

    Gene

  • Are they expensive? If not my simple suggestion would be to use two wired up in series, either control separately to give the fine resolution of an individual unit, or somehow gang the digital control signal up so they work at the same value (if that is possible) and your resolution would then be half the resolution of the single unit.

     

    What part numbers are you looking at using?

     

    Rod