Arduino Digipot Volume Control

Instead of controlling the LED brightnes one of the Digipots are used to control the volume of a speaker being driven with a square wave from pin 8 on the Arduino. The square wave frequency is also varied using the tone function.
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[kchoudhari]

Thanks for the nice presentation. It was very informative. Can you please help me with the similar Digipot (MCP41HV51).
I have MCP41HV51, which I want to use for high voltage applications. Can you please upload a video for using arduino with this Digipot. Thanks in advance.

[joeychickenskin]

Hi

That's really interesting.

If I understand it the LEDs are cycling through a sequence where the digipot, through the controller, offers less and less resistance creating the brightness swell.

Could an arduino/digipot be used in a similar way to control a digipot in a guitar pedal that would increase or decrease the volume of an audio signal over a given time to create a uniform fade in?

Do the increases have to come in discrete steps or would it be possible to have the increase have a logatithmic increment over time to replicate an audio/logaritmic potentimeter?

[acqurius-gxlr]

how to set digital potentiometer to a fix resistance value