Voltage Controlled Resistor using the LM13700. CHeck out that chip's Data Sheet from National for details.

Tony

> To: Doepfer_a100@yahoogroups.com
> From: david.salter@...
> Date: Wed, 12 Mar 2008 07:54:46 +0000
> Subject: RE: 1 Re: Adding a CV jack and attenuator to an existing variable function
>
> Good idea Adam,
>
> I'll have a look around. Thanks
>
> david
>
> David Salter
> Senior Consultant
> PSG
>
> Reuters Messaging: david.salter.reuters.com@...
> (t) +44 (0)20 7542 2402 | (m) 07990562402 | (f) 52699
>
> Get the latest news at Reuters.com < http://www.reuters.com/ >
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>
>
> ________________________________
>
> From: Doepfer_a100@yahoogroups.com [mailto: Doepfer_a100@yahoogroups.com ]
> On Behalf Of Adam-V
> Sent: 12 March 2008 00:08
> To: Doepfer_a100@yahoogroups.com
> Subject: 1 Re: Adding a CV jack and attenuator to an
> existing variable function
>
>
>
> Hi David,
>
> Sounds to me like this could be the ideal job for a vactrol. You would
> use the vactrol in place of the pot. Unfortunately I can't help with
> any circuit details but I reckon there will be plenty of vactrol
> circuits floating around the net.
>
> Cheers,
> Adam-V
> --- In Doepfer_a100@yahoogroups.com
> <mailto:Doepfer_a100%40yahoogroups.com> , David Salter
> <david.salter@...>
> wrote:
> >
> > In my quest to get some more effects into my modular - this will
> mostly
> > sit mid patch not just at the end - I was wondering if anyone can help
> > me.
> >
> > I have been looking at the ACE 16V effects chip, supplied by Cliff in
> > the UK. This is a simple device with 16 effect algorithms; 6 fixed
> > reverbs and 10 effects covering reverb, delay, chorus and flange with
> a
> > single variation adjusted by a pot. Ideally if I build this I would
> like
> > the variation to be under CV control.
> >
> > The variation varies from effect to effect some acting in a linear
> > fashion and some with 100 log steps so I appreciate that a CV would
> > cause jumps on some of these functions but I'm willing to try it and
> see
> > what it sounds like.
> >
> > However I'm not sure how to add the CV to it. any simple suggestions
> it
> > would be nice to have a depth attenuator as well as a CV socket.
> >
> > many thanks
> >
> > David
> >
> > David Salter
> > Senior Consultant
> > PSG
> >
> > Reuters Messaging: david.salter.reuters.com@...
> > (t) +44 (0)20 7542 2402 | (m) 07990562402 | (f) 52699
> >
> > Get the latest news at Reuters.com < http://www.reuters.com/
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> >
> >
> >
> >
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