[sdiy] Latest Project (VCO)

[patchell]

    3 to tune the VCO (offset, scale and tracking), 1 to adjust the saw offset,
1 to adjust the triangle offset, 3 to adjust the sinusoid (offset, symetry,
distortion), 1 to adjust the reference voltage, lets see, that is 9 of them,
and the final one I thought pretty clever...I am going to use a 10 turn pot to
set the pitch, so the last trimmer is to adjust the voltage to the 10 turn pot
so you can get exactly 1 octave / turn...I added that one at the very last
minute.  The board is 12 inches long by 2.75 inches high.  It needed to be that
long to get all the jacks and board mounted pots
(sine,saw,pulse,triangle,sync,lin FM in,PWM,PWM,Pitch,pitch,lin FM attenuatoin
pot,pulse width pot), the pitch pot is off board...there is a connector that
goes to at one end of the board.  The board is intended to be mounted on an 8U
pannel.

Jim Johnson wrote:

> I think Paul likes smaller boards, Jim. :')

    At one time I probably would have too, but, these days, you don't really
seem to have to pay much for board area.

>
>
> But man - I count 10 trimmers! Why so many?
>
> Jim
>
> *********** REPLY SEPARATOR  ***********
>
> On 8/9/02 at 6:03 PM patchell wrote:
>
> >Awww....geeee....it's not that many parts..... :-)
> >
> >    I could tell you that is two....but I would be a fibbin....nope, it is
> >just one.
> >
> >Paul Schreiber wrote:
> >
> >> Please tell me that's like 4 of them!!!
> >>
> >> Paul S.
> >>
> >> ----- Original Message -----
> >> From: "patchell" <patchell at silcom.com>
> >> To: <synth-diy at dropmix.xs4all.nl>
> >> Sent: Friday, August 09, 2002 4:08 PM
> >> Subject: [sdiy] Latest Project (VCO)
> >>
> >> >     Here is a photo of the latest PC board I am working on.
> >> >
> >> > http://www.silcom.com/~patchell/synthmodules/2001007.jpg
> >> >
> >> >     Not quite all the parts are in it (but enough to test it).  The
> >idea
> >> > behind this board is two fold.  First, the amont of wiring the board
> >> > will require is minimal, since most of the pots and jacks are right on
> >> > the board.
> >> >
> >> >     Second, it has the lastest experimental temp comp circuit on it.
> >> > Hopefully, I corrected a problem that was in the design originally (I
> >> > had a minor inversion, it originally would have doubled the tempco
> >> > instead of making it zero...minor detail :-) Ian pointed this out. )
> >> >
> >> > --
> >> >  -Jim
> >> > ------------------------------------------------
> >> > * Visit:http://www.silcom.com/~patchell/
> >> > *-----------------------------------------------
> >> > *I'm sure glad Merry Christmas comes just once a year
> >> > * -Yogi Yorgensen
> >> > ------------------------------------------------
> >> >
> >> >
> >
> >--
> > -Jim
> >------------------------------------------------
> >* Visit:http://www.silcom.com/~patchell/
> >*-----------------------------------------------
> >*I'm sure glad Merry Christmas comes just once a year
> >* -Yogi Yorgensen
> >------------------------------------------------
>
> Jim Johnson
> Metaphoric Software
> -------------------
> Makers of Techno Toys
> Software for Electronic Music
> http://www.technotoys.com
> info at technotoys.com

--
 -Jim
------------------------------------------------
* Visit:http://www.silcom.com/~patchell/
*-----------------------------------------------
*I'm sure glad Merry Christmas comes just once a year
* -Yogi Yorgensen
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