Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von royce
> Gesendet: Freitag, 7. April 2006 14:28
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: [Doepfer_a100] Digest Number 1448
>
>
> hi list,
>
>   i am would like to trigger my cr80000 drum machine from my
> modular and  via midi. . . but i've noticed that the cr8000
> internally seems to want  a trigger signal that is the opposite
> polarity of the standard signal.  i know that there are
> commercially available voltage invertors. the  problem is i want
> to invert about 14 channels, so this would get  prohibitively
> expensive. is this something that can be done easily?  anybody
> have any ideas, or a boatload of cheap voltage inverters?
>   royce
>
>
>
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> [Non-text portions of this message have been removed]
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>

> the A-175 only LED displays have been added).
> 
> Best wishes
> Dieter Doepfer
> 
> > -----Ursprüngliche Nachricht-----
> > Von: Doepfer_a100@yahoogroups.com
> > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von royce
> > Gesendet: Freitag, 7. April 2006 14:28
> > An: Doepfer_a100@yahoogroups.com
> > Betreff: Re: [Doepfer_a100] Digest Number 1448
> >
> >
> > hi list,
> >
> >   i am would like to trigger my cr80000 drum machine from my
> > modular and  via midi. . . but i've noticed that the cr8000
> > internally seems to want  a trigger signal that is the opposite
> > polarity of the standard signal.  i know that there are
> > commercially available voltage invertors. the  problem is i want
> > to invert about 14 channels, so this would get  prohibitively
> > expensive. is this something that can be done easily?  anybody
> > have any ideas, or a boatload of cheap voltage inverters?
> >   royce
> >
> >
> >
> > ---------------------------------
> > Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US
> > (and 30+ countries) for 2¢/min or less.
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von rrooyyccee
> Gesendet: Freitag, 7. April 2006 20:47
> An: Doepfer_a100@yahoogroups.com
> Betreff: [Doepfer_a100] Re: Digest Number 1448
>
>
> hi dieter,
> thanks alot for the tip. i'm impressed that you support diy efforts.
> they are still somewhat beyond my technical abilities.
> do you, or do you know of anybody, that could custom make a module for
> me that would invert say 8 - 12 gate signals for under 100 us$?
> royce
> --- In Doepfer_a100@yahoogroups.com, "Dieter Doepfer" <hardware@...>
> wrote:
> >
> > Look at our A-100 DIY page. Here you find the circuit of a voltage
> inverter
> > (inverting amplifier). It's just the circuit that is used in the
> A-175 (in
> > the A-175 only LED displays have been added).
> >
> > Best wishes
> > Dieter Doepfer
> >
> > > -----Ursprüngliche Nachricht-----
> > > Von: Doepfer_a100@yahoogroups.com
> > > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von royce
> > > Gesendet: Freitag, 7. April 2006 14:28
> > > An: Doepfer_a100@yahoogroups.com
> > > Betreff: Re: [Doepfer_a100] Digest Number 1448
> > >
> > >
> > > hi list,
> > >
> > >   i am would like to trigger my cr80000 drum machine from my
> > > modular and  via midi. . . but i've noticed that the cr8000
> > > internally seems to want  a trigger signal that is the opposite
> > > polarity of the standard signal.  i know that there are
> > > commercially available voltage invertors. the  problem is i want
> > > to invert about 14 channels, so this would get  prohibitively
> > > expensive. is this something that can be done easily?  anybody
> > > have any ideas, or a boatload of cheap voltage inverters?
> > >   royce
> > >
> > >
> > >
> > > ---------------------------------
> > > Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US
> > > (and 30+ countries) for 2¢/min or less.
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von Brandon Daniel
> Gesendet: Freitag, 7. April 2006 21:43
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: [Doepfer_a100] Re: Digest Number 1448
>
>
> On Fri, 7 Apr 2006, rrooyyccee wrote:
>
> > hi dieter,
> > thanks alot for the tip. i'm impressed that you support diy efforts.
> > they are still somewhat beyond my technical abilities.
> > do you, or do you know of anybody, that could custom make a module for
> > me that would invert say 8 - 12 gate signals for under 100 us$?
>
> Just a guess, but I don't think you're actually looking to "invert" the
> signals so much as "convert" them.
>
> The behavior you described (triggering when trigger is off, not sounding
> when trigger is on) isn't an inverted trigger (0v normal, -v trig) but a
> classic s-trig (+v normal, 0v trig) like moog synths and many early drum
> machines used.
>
> There's a circuit that's been on the web for ages for this:
>
> http://machines.hyperreal.org/manufacturers/Moog/schematics/moog.t
> rigger-convert.jpg
>
> A bunch of these may do the trick for you. Alternately, you could use a
> relay circuit for the job, which is what I'm having to do with my dr110...
>
> -Brandon
>
>
>
> Yahoo! Groups Links
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>