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Super Psycho LFO individual outputs

Super Psycho LFO individual outputs

2010-09-03 by Rico

Hey guys, Im trying to wire individual outs for each LFO on the Super Psycho LFO

So on the schematic it looks to me if i grab the signal from the 470k resistor (marked "mixer bus") and run it to a grounded jack I should be cool. When i tried it I got nothing, The rest of it is fine, seems to be working the same as before I took it apart. Jacks are grounded.

Am i missing something or am i just in the wrong place?

thanx

rico

Re: Super Psycho LFO individual outputs

2010-09-04 by sasami@hotkey.net.au

Bad! If you are taking it before the 470k, at the IC pin, you are risking
your chip. If you take it the bus side, you are connecting to a summing
node, where the voltage never varys from 0 volts!

Connect a 1k resistor the collector of each of the LED driver transistors.
Run thoes to output jacks. Note that the signal will be going between 0V and
about -13 volts (yes, MINUS 13 volts).
The circuit really isn't designed for individual outputs.

Ken
Show quoted textHide quoted text
>Hey guys, Im trying to wire individual outs for each LFO on the Super
Psycho LFO
>
>So on the schematic it looks to me if i grab the signal from the 470k
resistor (marked "mixer bus") and run it to a grounded jack I should be
cool. When i tried it I got nothing, The rest of it is fine, seems to be
working the same as before I took it apart. Jacks are grounded.
>
>Am i missing something or am i just in the wrong place?
>
>thanx
>
>rico
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: Super Psycho LFO individual outputs

2010-09-04 by Elby Designs

The point marked Mixer Bus is a virtual ground so you won't see anything. You need to take your outputs from the `other' side of those resistors. You may need to add a buffer on each one to prevent loading etc from external circuits.

You may be interested to know that for my Panther version (3U Eurorack) that I have an Expander Module which allows you to take any (fixed) mix of up to 5 oscillator outputs and passes them through a similar output stage with Glide and buffering. So, for example, in addition to the standard output on the Super Psycho LFO you can have another output which is a mix of, say, oscillators 1, 3 and 5 and then another output which is a mix of, say, oscillators 1, 2, 3 & 4 and so on.

Regards
Laurie Biddulph

Mobile: 0400 257 645
Elby Designs
www.elby-designs.com
ABN: 70 022 727 605


From: Rico
Sent: Saturday, September 04, 2010 9:58 AM
To: cgs_synth@yahoogroups.com
Subject: [cgs_synth] Super Psycho LFO individual outputs


Hey guys, Im trying to wire individual outs for each LFO on the Super Psycho LFO

So on the schematic it looks to me if i grab the signal from the 470k resistor (marked "mixer bus") and run it to a grounded jack I should be cool. When i tried it I got nothing, The rest of it is fine, seems to be working the same as before I took it apart. Jacks are grounded.

Am i missing something or am i just in the wrong place?

thanx

rico



------------------------------------

The CGS Modular Synth home page: http://www.cgs.synth.net/
Yahoo! Groups Links





[Non-text portions of this message have been removed]

Re: Super Psycho LFO individual outputs

2010-09-04 by Rico Loverde

Thank you guys, I really appreciate the help. Gonna try the buffer route
tomorrow. The expander sounds like a great idea, thanx Laurie.

On Fri, Sep 3, 2010 at 10:11 PM, Elby Designs
<elby_designs@...>wrote:
Show quoted textHide quoted text
>
>
> The point marked Mixer Bus is a virtual ground so you won't see anything.
> You need to take your outputs from the `other' side of those resistors. You
> may need to add a buffer on each one to prevent loading etc from external
> circuits.
>
> You may be interested to know that for my Panther version (3U Eurorack)
> that I have an Expander Module which allows you to take any (fixed) mix of
> up to 5 oscillator outputs and passes them through a similar output stage
> with Glide and buffering. So, for example, in addition to the standard
> output on the Super Psycho LFO you can have another output which is a mix
> of, say, oscillators 1, 3 and 5 and then another output which is a mix of,
> say, oscillators 1, 2, 3 & 4 and so on.
>
> Regards
> Laurie Biddulph
>
> Mobile: 0400 257 645
> Elby Designs
> www.elby-designs.com
> ABN: 70 022 727 605
>
> From: Rico
> Sent: Saturday, September 04, 2010 9:58 AM
>
> To: cgs_synth@yahoogroups.com <cgs_synth%40yahoogroups.com>
> Subject: [cgs_synth] Super Psycho LFO individual outputs
>
> Hey guys, Im trying to wire individual outs for each LFO on the Super
> Psycho LFO
>
> So on the schematic it looks to me if i grab the signal from the 470k
> resistor (marked "mixer bus") and run it to a grounded jack I should be
> cool. When i tried it I got nothing, The rest of it is fine, seems to be
> working the same as before I took it apart. Jacks are grounded.
>
> Am i missing something or am i just in the wrong place?
>
> thanx
>
> rico
>
> ------------------------------------
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
> Yahoo! Groups Links
>
> [Non-text portions of this message have been removed]
>
>
>



--
________________
rico loverde
415.596.6255
ricoloverde.com


[Non-text portions of this message have been removed]

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