Using PIC 18F4550 to make a digital potentiometer.

[pranavm1502]

Hi there,
I have to make a digital potentiometer using PIC 18F4550. Can anyone suggest how to do that using minimum peripherals and no potentiometer IC?

 

[thannara123]

You can purchase digital potentiometer

 

[vishaletm]

Use DS1669 10, 10kΩ resistance.

 

[pranavm1502]

You can purchase digital potentiometer

The thing is that I have to program the microcontroller to behave as digital potentiometer.


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Can you say how can I do it via SPI?

 

[thannara123]

See here https://www.edaboard.com/threads/206133/

 

[tpetar]

Look this project he currently uses PIC18F2550 but can be easely modified to use PIC18F4550 or you can just continue using PIC18F2550 like cheaper variant :


LM386 based stereo audio amplifier with digital volume control
https://embedded-lab.com/blog/?p=2967

 

[pranavm1502]

Look this project he currently uses PIC18F2550 but can be easely modified to use PIC18F4550 or you can just continue using PIC18F2550 like cheaper variant :


LM386 based stereo audio amplifier with digital volume control
https://embedded-lab.com/blog/?p=2967

and

See here https://www.edaboard.com/threads/206133/

I ll surely go through them.