Using PIC 18F4550 to make a digital potentiometer.

pranavm1502 · Jun 28, 2012

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 · Jun 28, 2012

You can purchase digital potentiometer

vishaletm · Jun 28, 2012

Use DS1669 10, 10kΩ resistance.

pranavm1502 · Jun 28, 2012

thannara123 said:
You can purchase digital potentiometer

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

//////
Can you say how can I do it via SPI?

thannara123 · Jun 28, 2012

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

tpetar · Jun 28, 2012

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 · Jun 28, 2012

tpetar said:
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

thannara123 said:
See here https://www.edaboard.com/threads/206133/

I ll surely go through them.

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Using PIC 18F4550 to make a digital potentiometer.

pranavm1502

Newbie level 6

thannara123

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vishaletm

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pranavm1502

Newbie level 6

thannara123

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tpetar

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pranavm1502

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