Potentiometers in series?

[Joshua]

Hello all,

Another circuitry novice seeking advice. I have been experimenting
with Arduino and a few shields lately, and I am ready to go on this
project. The one question I have is: Would it be possible for me to
connect multiple potentiometers in series? Here is my specific idea: I
want to build the Auduino with a single-turn pot and a SoftPot ribbon
on every param so that I can tweak each with a touch controller, using
the first potentiometer to maintain a constant value when I am not
applying pressure to the ribbons (mainly to avoid writing code to give
the SoftPots positional memory.) Is this possible?

[davitr0n]

I've been attempting to deal with this specific issue with my ADASYNTH
project. It is my understanding that this is definitely possible,
only you must think more of applying a different voltage.

My implementation of this involves a 0-5 variable voltage (controlled
by a potentiometer) going to an analog input. I also add in a point
at which you can plug in an analog source in parallel to this same
input. If there is another 0-5v source going to this input it appears
to have the effect of adding both voltages and dividing by 2.

The result of this may not be what you want since this isn't simply
adding voltage but rather dividing.

A more simple implementation of this would be to just use another
analog input. Since the arduino only has 6 inputs and adding another
analog read into the mix brings about more overhead this may not be
feasible. It's going to be some sort of compromise.

There is of course circuitry for adding voltage but then this would
mean you would have to tweak some of the circuitry in order to
maintain the range of 0 to 5 volts going into an analog arduino input.

Here's a video of my implementation in action:
http://vimeo.com/7863435

[jw hagenbeek]

hhhm i was thinking of putting my auduino between my modular stuff. so
instead of pots, just cv in. but don't know how to divide, maybe i use
a doepfer cv adder.

[jw hagenbeek]

--> davitr0n: what is your incredible kind of modular???? i was
looking a lot about arduino and sound but this one is just good! do
you have a scheme of it?

[Joshua]

You may be interested in this, doesn't solve the problem quickly but
it's something to add to the brain cauldron:

http://www.allaboutcircuits.com/vol_6/chpt_3/8.html

Continuing to press on.

[davitr0n]

That is my modular arduino synthesizer that I've been working on over
the last year or so. I'm nearly done with the final design decisions
(hopefully I don't change my mind again!), so the schematics and code
will be up on my website (adasynth.tumblr.com) somewhere in the next
few months.

Apologies to Auduino. I probably shouldn't promote myself here.

[Jesse Juup]

Awesome stuff there davitr0n, no need to apologize imho!

- Jesse -

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