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--- john mahoney <jmahoney@gate.net> wrote:
> The A-161 has only one chip -- a CD4024 -- and the rest is
> discrete. The A-160 has a CD4017 plus discrete parts. They should
> work fine on +/-15V.

OK, lets just cut to the chase here on this clock divider.  Unless
you already own one, conversion is a waste of money.  The PCB and
electronic parts are worth less than $10.  The rest of it (the
expensive parts) the panel, jacks and such you have to replace
anyhow.

This is a dirt simple circuit.  As John pointed out, it has only one
chip.  I imagine he is using transistors for the output drivers in
switching mode. So, I imagine if you run it on 15V you will get
higher voltage swing on the outputs.

If you have any building skills at all buy the Blacet Binary Zone. 
It is a far more interesting and versitale module than a simple clock
divider.  OK, I realize it does not have individual outputs.  But,
they are very simple to add if you like.  John will even sell you the
"basic version" of the module which comes without panel, knobs, jacks
and pots.

> I'd take panels for one A-161 and two A-160s, since I have them
> already. But I'd like more of the Doepfer clock and logic modules,
> or the same type of panels for DIY modules.

Give us an idea of what you want on the panel.  We can do it.
Larry




		
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> > The A-161 has only one chip -- a CD4024 -- and the rest is
> > discrete. The A-160 has a CD4017 plus discrete parts. They should
> > work fine on +/-15V.
>
> OK, lets just cut to the chase here on this clock divider.  Unless
> you already own one, conversion is a waste of money.  The PCB and
> electronic parts are worth less than $10.  The rest of it (the
> expensive parts) the panel, jacks and such you have to replace
> anyhow.

True. If you are a DIYer, you don't need these modules. For those who want
kits, Ken Stone covers some of this ground, and MOTM panel designs exist.
Example: http://www.wiseguysynth.com/larry/panel/gif/cgs_div_bool.gif


> This is a dirt simple circuit.

One notch above a Forrest Mim's book. ;-)


> As John pointed out, it has only one
> chip.  I imagine he is using transistors for the output drivers in
> switching mode.

Right, like Ken Stone does on his pulse divider:
    http://www.cgs.synth.net/modules/cgs36_pulse_divider.html

As for the Doepfers, the A-161 Gate Sequencer has no front panel inputs, 8
outputs and 8 BC547 trannies, thus one per output. But the A-160 Clock
Divider seems to have more transistors than outputs. It doesn't really
matter -- I don't need to know how these Doepfer modules work, I'm just
commenting since it came up.


> So, I imagine if you run it on 15V you will get
> higher voltage swing on the outputs.

Would this higher voltage be a problem? This is obviously a common
technique. Hmmm... Are different resistor values needed around the buffer
trannies, depending on the power supply voltage?


> If you have any building skills at all buy the Blacet Binary Zone.
> It is a far more interesting and versitale module than a simple clock
> divider.  OK, I realize it does not have individual outputs.

The BZ looks cool, but the individual outs are what I want this for.


> But,
> they are very simple to add if you like.  John will even sell you the
> "basic version" of the module which comes without panel, knobs, jacks
> and pots.

It's so cool that he does that.


> > I'd take panels for one A-161 and two A-160s, since I have them
> > already. But I'd like more of the Doepfer clock and logic modules,
> > or the same type of panels for DIY modules.
>
> Give us an idea of what you want on the panel.  We can do it.
> Larry

Great, but I might want it in MOTM format! (Oops, wrong list... ;-)

Who does the panel designs and artwor, anyway -- the buyers or the Stooges?
--
john

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

> > So, I imagine if you run it on 15V you will get
> > higher voltage swing on the outputs.
> 
> Would this higher voltage be a problem? This is obviously a common
> technique. Hmmm... Are different resistor values needed around the
> buffer trannies, depending on the power supply voltage?

The trannies are switched ON or OFF.  So, the power supply rails and
junction drops are basically limiting the output swing One coudl
insert some resistors to divide that.  I'd have the see the
schematic.  Oh wait, you don't get schematics when you buy Doepfer.
Add that to the list of reasons I have only one Doepfer module.

> If you have any building skills at all buy the Blacet Binary
> Zone. It is a far more interesting and versitale module than a 
> simple clock divider.  OK, I realize it does not have individual
> outputs.
> 
> The BZ looks cool, but the individual outs are what I want this
> for.

They are easy enough to add. :-)

> Great, but I might want it in MOTM format! (Oops, wrong list... ;-)
> 
> Who does the panel designs and artwor, anyway -- the buyers or the
> Stooges?

Either.  Dave Bradley does all our artwork.  You can submit your own
(we use Corel version 7).  But, usually we have to tweak them to grid
specs.  Best to just give use some kind of common drawing (jpg, PDF,
GIF, BMP) representing what you want and let us go from there.

Larry


		
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Thanks again, Larry. I'll try to sketch up a panel design, but don't let
that stop anyone else.
--
john