Emerson's Moog.

[David Halliday (Volt Computer)]

Two things come to mind - how about SIMM sockets?  Regular SIMM sockets are
cheap and the layout for the circuit boards are in most layout libraries.
If you are concerned about durability, there are some sockets made for SIMM
testers that are fantastic.

Also, why use pots?  How about using analog switches clocked at a couple
hundred kHz and vary the pulse width - this will act just like a variable
resistor and can easily be controlled by a small computer.



-----Original Message-----
From: Paul Maddox [mailto:space_banana at hotmail.com]
Sent: Friday, July 16, 1999 12:40 AM
To: alvitar at traveller.com
Cc: synth-diy at mailhost.bpa.nl
Subject: Re: Emerson's Moog.


Phil,

>
>I just gave 40 DIL as an example.  There are ZIF sockets for
>PGA parts with hundreds of connections, but they get pricey.
>Also, I have not seen headers for these and working at that
>density would be difficult.  You would probably need to build
>a prototype board that brought each pin out to a proto area.
>The headers for DIL sockets have enough area for wiring and
>resistors.
>

True, hadnt thought of PGA zif sockets... though as you say expensive and 
mounting pots and such on could be a pain... I'll have a think.

It may be worth makeing a simple synth, that has upto 38 settings (we need 
two pins for +v and -v!) it should be possible..

Paul


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