MCP42100 Digital Pot Breakout Board

A few example application circuits using MCP41xxx or MCP42xxx series digital pots.
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[@pileofstuff]

Interesting application of digital pots.
And good to know about more affordable options too.

[@matzer8846]

Great introduction and applications ... thanks a lot for sharing

[@gelonzo71]

Hi, new to electronics. I red "digital pot" and I thought "since when does a rice cooker have a part number?"

[@GadgetReboot]

my first thought would’ve been instant pot if I didn’t already know what it was. but mine is not one of those fancy ones with the wireless control.

[@72ndHUMAN]

ill build
thanks for sharing

[@TheEmbeddedHobbyist]

I do prefer the pot's that remember where you left them. i think i would like to set the pot start at one end, as then it could be min gain and not mid level.
But you can get around that by having an audio enable which you enable once you have configured all the pots and the circuit has stabilised.
I do like videos that get me thinking about how i would use one.

[@GadgetReboot]

That was one of the features of the X9C series where you could optionally save the position of the pot. I don’t know why those got so expensive, otherwise I’d probably still be using them because it’s the first one I ever tried and I have a bunch but not in surface mount.

[@LandMineFX]

I ordered some MCP pots awhile back but haven't gotten to mess with them, yet. I have been trying to get an AD5241 to work, but can't seem to get the Arduino to communicate with it. I've been looking for a digital pot made that will go up to the 1M range

[@tiokowka]

Hi! Thanks for your video. I have a problem with these ICs. I connected an audio supply, and I can control the volume. The problem is that when I change the pots' position, I hear an audible click noise. Do you know about this problem? Did you have this problem when you implemented it?

[@sted9245]

Would there be a way to use this in a 12v circuit on the pot side?

[@GadgetReboot]

The pot can only be exposed to 5 V max so if there is 12 V involved then the pot can’t be directly exposed to that, it would have to have something else to divide the 12 V down

[@matheusferrocosta4743]

If i buy two in pcbway they come assembled and working ?

[@GadgetReboot]

they can be bought assembled or just blank circuit boards. They don’t do any functional testing so I assume they just make sure it looks like it’s assembled properly.

[@matheusferrocosta4743]

Great. I am awaiting the pcbway review to pay. Would be nice if there was a 3d printed sanded black plastic shell option with power supply. How do i figure the phone number to dial ?@@GadgetReboot

[@matheusferrocosta4743]

I am buying this to put my us robotics courier to use again and show to my 4 year daughter and maybe a western electric rotary phone

[@GadgetReboot]

in the sketch program that goes into the ESP module, in one of the files there’s a remote and local phone number hardcoded so each board would have to have those two numbers swapped when being programmed so that it would make sense. (each phone has a different local number and they can only call the opposite phone number as the remote target)
The whole thing is really just a hacked together experiment and I’m working on another expansion thing to make it more controlled in future projects.
github.com/GadgetReboot/Phone_SLIM/blob/main/sketch/project_globals.cpp