Digital Potentiometer Control

This video will show how to control a Digital Potentiometer using a microcontroller. This technique can be used to build a digital volume control, opamp gain adjust, voltage regulator control, comparator threshold setting or any application where a variable resistance is controlled by a microcontroller.

[LaminarSound]

Im an electrician and musician as well. I never knew this was how this stuff was done. Ive recently gotten very interested in analog synthesizers and it has boggled my mind how we can store and recall settings of analog potentiometers and this video has answered my main question. Pretty incredible. Thanks much.

[magnet_kitty]

OMG, thank you. This is just the sort of thing I was looking for. I've been planning a project that is using an RC controller to control an arduino that pulses a power transistor at high frequencies, but my understanding is that an arduino's PWM can't handle higher than 65 khz without issues. I could obviously just use a 555 timer or other IC & some pots to get the low duty cycle 1-4 Mhz I need - but I can't use a traditional knob turning pot, since it has to be RC. A digital pot is going to make it so much easier to figure out this design; I didn't know there was such a component.

[francisvachon]

Really like your video and would like to do similar setup except I would like the digital pot to be control by a temperature sensor so that the temperature remain constant. I am using TEC cooling pad to cool a Diode laser and by varying the DC power (12v or less) it lower the cooling capability. So when cutting with the laser on high power I need more cooling then when I am engraving and also depending on how deep I am engraving the temperature will change.

[mahlonkarpaiya]

thank you . well explained. Good class, teacher.

[paulmanhart]

Great video. I actually understood much of it.
It seems that the number of resistors determines your resolution?
I want to hook up a digital pot to my SCR controlled variable speed drive for my 130 vdc 4.25 hp treadmill motor. But I have no idea how to do this. I followed your video, but have trouble implementing it to my application. I like your keypad control. That’s cool.
Can you help me figure out what I need and how to hook it up? I need 140k Ohms max. I’m currently breaking that down into a 117k and a 25k pot wired in series for course and fine rpm adjustment.
Thanks,
Paul

[lew]

Very informative video. Please may I ask whether there is any cause for potential delay when using one of the chips X9C103P?Does the initial voltage on a digital or manual potentiometer make a difference? Very curious.

[SmalltimR]

Great tutorial - I'm looking forward to using these with Arduino.
Anyone know how many watts can the X9C103P can handle on the pot side?
Also, does anyone know how to use a digipot in high wattage applications?

[mahlonkarpaiya]

Id like to do this with audio. Arduinos make a;lot of noise. can i power the chip from something eles ?

[Enigma]

These seem to only handle a few ma of current so I don't see them as a direct replacement for standard pots like the one shown at the beginning of the video.

[johnmalcolm]

If you already know what a manual potentiometer is, skip the first 3 minutes.

[acqurius-gxlr]

how to adjust digital pot to a predefined resistance.is there any calculate that can be used in program to adjust the resistance to a define value

[dwalden]

Can you provide the code you used for this?

[LalanKumar-fzoo]

can i code the arduino to get a specifir resistance using key pad ??? like getting 2k ohms directly, just by pressing ' 2 ' in the keypad ???

[theplaidgamer]

How do i make it save the current value automatically?

[Thisishousemusic]

I'm looking for a way to digitally control volume, would this be a solution? Im not sure how the resistor will change the input signal to the amplifier.

[mmbrazil]

Hi, your video was just what I was looking for. I am trying to do a digital AC controller. My AC box uses 3 10k potenciometer like you show in the begining of your video, to controll it. My question is what digital potentiometer do you suggest I use to controll the AC motors.

[Sandreble]

great video... did you use any library in this example ?

[freetubemovies.]

Hello, I really liked your video sir ! 💜💜
Sir, actually I need your help !

sir, I am working on a project where I have to use a suitable potentiometer that can oppose 2 Amperes of D.C current !!!

I have 6 A of D.C current and I want to use 4 A of D.C current by stopping 2 Amperes using a potentiometer or anyhow possible !

6-2 = 4 ( 4 Amperes I want to achieve).


Can you please tell me which potentiometer should I use or how can I do that anyway ?

[arrshithrg]

what signal u were giveing at ra, rb of digipot . Sine wave ??

[Milan]

Do you know if there are any with more then 500kOhm and 2W.
Because i have a mechanical one and cant find a digital one to replace it