Fwd: Re: Modular Project!

From Stefan Gruhl (CIP 92)
Sent Thu, Jan 21st 1970, 01:00

> >>We can use 3 space high 19" racks for example and make each of the 
> Ric:
> >Some people on here prefer the smaller front panel type of system, such as 
> >4"x4" or 6"x4" type of panels.  I've been there, and stopped.
> >I've gone to 1, 2 and 3 rack unit 19" panels for all of my stuff, and I 
> >haven't looked back since.
> 
> I also strongly suggest a 19" 3U system, preferably a Europac-system. It's
> extremly versatile. You can do pretty much anything with that system. It
> basically consists of an empty 19" rack 3 or 6 U high divided into 84 wide
> spaces were one width unit (TE) equals to 1/5 to an inch (5.08 mm). There are
> alot of prefabricated panels, connectors, powersupplies etc around. The
> drawback is price and availability. In Europe the europac-systems are widely
> spread and used, but how about US and Australia? 

I am unshure of this 19" namings. I believe this is just the way, the
new doepfer Modular is done.
I did a long review of that last recently. 

If you like this size anyway, how about using their standart ?
I think their power supply bus is fine as well, easy and versatile.
15V for analog mudules and 5V for digital ones.
You also would get 2 advantages:

1) you had immediately find that company to supply our project commercially.

2) The technically not so much involved guys like me,
( I need extremely precise working instuctions ) could participate as well.
The original system is reasonably prices imho, so at least parts could
be easily bought there.
For you US analogue lovers, I would offer to a limited amount of AH
members, to even buy and ship it to for you.

Remark: Im am not connected in any way to doepfer except a phone number :-)

Why not buy the whole thing from them?
Their modules are still verry basic and we would go for something else.

CU
steve



> We need to agree on is supply voltage (that's easy) and CV levels / impedance
> and signal-levels / impedance. What about 1/4" versus 4mm (Sergetype)
> connectors?
> 
> What we need to agree on also, in my opinion, is a backplane bus. A bus that
> interconnects the individual PCBs. Regardless if there are individual boxes
> for each module or a eurocard system with a common enclosure and different
> frontpanels I believe we should distribute a common bus to the modules
> containing at least +/- 15v, 5v and earth. I'm open to any type of physical
> busconnection. My currently planned/being built modules at home will support a
> bus that apart of the above contains:
> - key cv x 2
> - trig x 2 ch
> - modulation channels x 8
> - audio ch x 4
> Or we could skip the predetermination of what should be on each line and
> simply name them 1-16, if we have 16 buslines. Maybe thats more in the modular
> spirit.
> 
The doepfer just used a bus containing one pair of CV/gate I think.
So you usually get one monophon module with each box.
Indeed a little limited, but why not?
the space is just enough you enough modules for ONE vco.
More voices would cost you simply another rack system with it's own
cv bus.

Comments?
steve
> 


-- 
* real electronic composers don't like their music be restricted    * 
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* Stefan Gruhl * sngruhl@cip.informatik.uni-erlangen.de             *
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