MOTM

So now that I have been fiddleing with my modules for a bit I find the
need for 2 things:

1.- knobs to attenuate things like modulation sources. I could be
attenuating both CV or audio. Do I use log or linear taper pots?
100K OK? Any suggestions, circuits? There seems to be a bunch of
stuff oot on the 'net but I thought it would be a good idea to ask
fellow MOTMizers.

2.- a voltage source where I can get from say -5V to +5V with the
swing of a knob. I am led to believe that PS decoupling is very
important in this application. Any suggestions, circuits?

It makes me giggle a bit to realize that the complex things like a VCO
that tracks linearly from DC to 37.5 terrahertz is a slam-dunk but the
little niggly bits like cables and silly like tweaky circuits are
missing from my rig. Here is an icon to depict me giggling ---> :-P

PLL, BFG

Greg,

Unless I'm mistaken, for #1, The MOTM 830 Audio/CV mixer is what you want.
And for #2, Tony Allgood (Oakley Sound) might still have some Control 3
boards available. I bought 2 to have a straight CV source in my system
like what you are asking for.

Another Greg

-----Original Message-----
From: motm@yahoogroups.com [mailto:motm@yahoogroups.com]On Behalf Of
Greg Amann
Sent: Wednesday, July 27, 2005 9:59 AM
To: motm@yahoogroups.com
Subject: [motm] Attenuators and voltage sources


So now that I have been fiddleing with my modules for a bit I find the
need for 2 things:

1.- knobs to attenuate things like modulation sources. I could be
attenuating both CV or audio. Do I use log or linear taper pots?
100K OK? Any suggestions, circuits? There seems to be a bunch of
stuff oot on the 'net but I thought it would be a good idea to ask
fellow MOTMizers.

2.- a voltage source where I can get from say -5V to +5V with the
swing of a knob. I am led to believe that PS decoupling is very
important in this application. Any suggestions, circuits?

It makes me giggle a bit to realize that the complex things like a VCO
that tracks linearly from DC to 37.5 terrahertz is a slam-dunk but the
little niggly bits like cables and silly like tweaky circuits are
missing from my rig. Here is an icon to depict me giggling ---> :-P

PLL, BFG






Yahoo! Groups Links

> 1.- knobs to attenuate things like modulation sources. I could be
> attenuating both CV or audio. Do I use log or linear taper pots?
> 100K OK? Any suggestions, circuits? There seems to be a bunch of
> stuff oot on the 'net but I thought it would be a good idea to ask
> fellow MOTMizers.

audio = log 50K or 100K OK
CV = lineat 25K to 100K OK

>
> 2.- a voltage source where I can get from say -5V to +5V with the
> swing of a knob. I am led to believe that PS decoupling is very
> important in this application. Any suggestions, circuits?

MOTM-830 :)

Paul S.

> Tony Allgood (Oakley Sound) might still have some Control 3 boards
> available.

Sorry but they have all gone. It would have done the trick too.

Tony

Are you actually going out of the modular scene? If so maybe you could provide schematics and
instructions for those who may need this sort of thing. For a fee of course.

----- Original Message -----
From: "Oakley Sound" <tonyallgood@...>
To: <motm@yahoogroups.com>
Sent: Wednesday, July 27, 2005 2:14 PM
Subject: Re: [motm] Attenuators and voltage sources


> > Tony Allgood (Oakley Sound) might still have some Control 3 boards
> > available.
>
> Sorry but they have all gone. It would have done the trick too.
>
> Tony
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Anti-Virus.
> Version: 7.0.338 / Virus Database: 267.9.5/58 - Release Date: 7/25/2005
>
>

I for one would be happy to pay whatever Tony thinks
is fair for the right to build personal-use modules
from the schematics, part lists, board layouts, and
other documentation for his great designs. I know it
would have to be on a no-support basis for it to make
sense for Tony.

skw


-----Original Message-----
From: motm@yahoogroups.com [mailto:motm@yahoogroups.com] On Behalf Of Wood
Sent: Wednesday, July 27, 2005 6:13 PM
To: Oakley Sound; motm@yahoogroups.com
Subject: Re: [motm] Attenuators and voltage sources

Are you actually going out of the modular scene? If so maybe you could provide schematics and
instructions for those who may need this sort of thing. For a fee of course.

----- Original Message -----
From: "Oakley Sound" <tonyallgood@...>
To: <motm@yahoogroups.com>
Sent: Wednesday, July 27, 2005 2:14 PM
Subject: Re: [motm] Attenuators and voltage sources


> > Tony Allgood (Oakley Sound) might still have some Control 3 boards
> > available.
>
> Sorry but they have all gone. It would have done the trick too.
>
> Tony
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Anti-Virus.
> Version: 7.0.338 / Virus Database: 267.9.5/58 - Release Date: 7/25/2005
>
>



Yahoo! Groups Links

Yes please! I would be very happy to purchase building info.

pete

www.cubanpetemusic.com




--
listen to my tunes,

http://www.cubanpetemusic.com/12_21_04%20final%20mix.mp3

www.cubanpetemusic.com

Yes please! I would be very happy to purchase building info.

pete

www.cubanpetemusic.com




--
listen to my tunes,

http://www.cubanpetemusic.com/12_21_04%20final%20mix.mp3

www.cubanpetemusic.com

I have to say that it was with a heavy heart that I learned of
Tony's retirement from the module production game. I wonder whether
it is still plausible for you to produce the boards a la Ken Stone.
I don't know whether it's feasible or worth your time, but by gosh,
I was just getting my modular project going when this RoHS thing
came around and bit me in the bottom.

cheers,
eric f

--- In motm@yahoogroups.com, Pete <23isgood@g...> wrote:
> Yes please! I would be very happy to purchase building info.
>
> pete
>
> www.cubanpetemusic.com <http://www.cubanpetemusic.com>
>
> On 7/27/05, scott@r... <scott@r...> wrote:
> >
> > I for one would be happy to pay whatever Tony thinks
> > is fair for the right to build personal-use modules
> > from the schematics, part lists, board layouts, and
> > other documentation for his great designs. I know it
> > would have to be on a no-support basis for it to make
> > sense for Tony.
> >
> > skw
> >
> >
> > -----Original Message-----
> > From: motm@yahoogroups.com [mailto:motm@yahoogroups.com] On
Behalf Of Wood
> > Sent: Wednesday, July 27, 2005 6:13 PM
> > To: Oakley Sound; motm@yahoogroups.com
> > Subject: Re: [motm] Attenuators and voltage sources
> >
> > Are you actually going out of the modular scene? If so maybe you
could
> > provide schematics and
> > instructions for those who may need this sort of thing. For a
fee of
> > course.
> > ----- Original Message -----
> > From: "Oakley Sound" <tonyallgood@b...>
> > To: <motm@yahoogroups.com>
> > Sent: Wednesday, July 27, 2005 2:14 PM
> > Subject: Re: [motm] Attenuators and voltage sources
> >
> >
> > > > Tony Allgood (Oakley Sound) might still have some Control 3
boards
> > > > available.
> > >
> > > Sorry but they have all gone. It would have done the trick too.
> > >
> > > Tony
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --
> > > No virus found in this incoming message.
> > > Checked by AVG Anti-Virus.
> > > Version: 7.0.338 / Virus Database: 267.9.5/58 - Release Date:
7/25/2005
> > >
> > >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> > ------------------------------
> > YAHOO! GROUPS LINKS
> >
> >
> > - Visit your group "motm
<http://groups.yahoo.com/group/motm>" on
> > the web.
> > - To unsubscribe from this group, send an email to:
> > motm-unsubscribe@yahoogroups.com<motm-
unsubscribe@yahoogroups.com?subject=Unsubscribe>
> > - Your use of Yahoo! Groups is subject to the Yahoo! Terms
of
> > Service <http://docs.yahoo.com/info/terms/>.
> >
> >
> > ------------------------------
> >
>
>
>
> --
> listen to my tunes,
>
> http://www.cubanpetemusic.com/12_21_04%20final%20mix.mp3
>
> www.cubanpetemusic.com <http://www.cubanpetemusic.com>

Want to build a voltage source? It just so happens that I once got some good
info on this very subject from Larry Hendry. I asked Larry if I could post
it, and of course he said of course. Here it is:

http://www.bitshifted.com/synthdiy/CVsource.html

Enjoy!
--
john

This is an apology for using bandwidth.  I asked a question 2 days ago to which I had the solution already, but forgot.  I have since built up my MOTM 830 and now a a CV source in the rig.  Duuuuh...

PLL, BFG

john mahoney wrote:

Want to build a voltage source? It just so happens that I once got some good
info on this very subject from Larry Hendry. I asked Larry if I could post
it, and of course he said of course. Here it is:

    http://www.bitshifted.com/synthdiy/CVsource.html

Enjoy!
--
john

Good reference material though!

----- Original Message -----

From: Greg Amann

To: motm@yahoogroups.com

Sent: Friday, July 29, 2005 9:18 AM

Subject: Re: [motm] Attenuators and voltage sources

This is an apology for using bandwidth.  I asked a question 2 days ago to which I had the solution already, but forgot.  I have since built up my MOTM 830 and now a a CV source in the rig.  Duuuuh...

PLL, BFG

john mahoney wrote:

Want to build a voltage source? It just so happens that I once got some good
info on this very subject from Larry Hendry. I asked Larry if I could post
it, and of course he said of course. Here it is:

    http://www.bitshifted.com/synthdiy/CVsource.html

Enjoy!
--
john

Quick source of DC in a standard MOTM system:

Take the output of a spare MOTM-800 EG, unplug any Gate or Trigger
inputs, and vary the SUSTAIN knob - you'll get 0 to approx. 5 volts at
the output.

Plug that into a MOTM-830 mixer with reversible gain, and you now have
a nice buffered positive or negative DC offset voltage to apply
anywhere you want.

Moe
http://www.hotrodmotm.com

--- In motm@yahoogroups.com, Greg Amann <greg.amann@s...> wrote:
> This is an apology for using bandwidth. I asked a question 2 days ago
> to which I had the solution already, but forgot. I have since built up
> my MOTM 830 and now a a CV source in the rig. Duuuuh...
>

I would like to take the opportunity to thank John in
public for this sweet tutorial!
This is very very helpful for us newbies, particularly
beacuse his article goes into the little details and
explains them so well (like the ratio of R2/R3 and why
R1 is there)!

Thanks so much John!!

With Best Wishes,

Dino


--- john mahoney <jmahoney@...> wrote:

> Want to build a voltage source? It just so happens
> that I once got some good
> info on this very subject from Larry Hendry. I asked
> Larry if I could post
> it, and of course he said of course. Here it is:
>
> http://www.bitshifted.com/synthdiy/CVsource.html
>
> Enjoy!
> --
> john

__________________________________________________
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You're welcome, Dino, but thanks should go to Larry! I merely posted his
work, with his permission.
--
john

(Larry, let me know if you want to host this on wiseguysynth, instead.)

----- Original Message -----
From: "Dino Leone" <d_p_leone@...>
To: "john mahoney" <jmahoney@...>; <>
Sent: Monday, August 01, 2005 12:11 PM
Subject: Re: [motm] Attenuators and voltage sources


> I would like to take the opportunity to thank John in
> public for this sweet tutorial!
> This is very very helpful for us newbies, particularly
> beacuse his article goes into the little details and
> explains them so well (like the ratio of R2/R3 and why
> R1 is there)!
>
> Thanks so much John!!
>
> With Best Wishes,
>
> Dino
>
>
> --- john mahoney <jmahoney@...> wrote:
>
> > Want to build a voltage source? It just so happens
> > that I once got some good
> > info on this very subject from Larry Hendry. I asked
> > Larry if I could post
> > it, and of course he said of course. Here it is:
> >
> > http://www.bitshifted.com/synthdiy/CVsource.html
> >
> > Enjoy!
> > --
> > john

Indeed. Thanks to both of you guys!! Sorry about that
Larry!

Dino





--- john mahoney <jmahoney@...> wrote:

> You're welcome, Dino, but thanks should go to Larry!
> I merely posted his
> work, with his permission.
> --
> john
>
> (Larry, let me know if you want to host this on
> wiseguysynth, instead.)
>
>
> ----- Original Message -----
> From: "Dino Leone" <d_p_leone@...>
> To: "john mahoney" <jmahoney@...>; <>
> Sent: Monday, August 01, 2005 12:11 PM
> Subject: Re: [motm] Attenuators and voltage sources
>
>
> > I would like to take the opportunity to thank John
> in
> > public for this sweet tutorial!
> > This is very very helpful for us newbies,
> particularly
> > beacuse his article goes into the little details
> and
> > explains them so well (like the ratio of R2/R3 and
> why
> > R1 is there)!
> >
> > Thanks so much John!!
> >
> > With Best Wishes,
> >
> > Dino
> >
> >
> > --- john mahoney <jmahoney@...> wrote:
> >
> > > Want to build a voltage source? It just so
> happens
> > > that I once got some good
> > > info on this very subject from Larry Hendry. I
> asked
> > > Larry if I could post
> > > it, and of course he said of course. Here it is:
> > >
> > >
> http://www.bitshifted.com/synthdiy/CVsource.html
> > >
> > > Enjoy!
> > > --
> > > john
>
>
>
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--- john mahoney <jmahoney@...> wrote:

> You're welcome, Dino, but thanks should go to Larry! I merely posted his

work, with his permission.

Not my work. Just common simple stuff right out of Forrest Mimms op amp
book from Radio Shack, and information from the 1000 stupid questions I
asked Paul.

> (Larry, let me know if you want to host this on wiseguysynth, instead.)

Certainly not. Then I'd have to do work. :-)
Larry