MOTM

A standard cheap seq uses cheap pots from +5 to ground to get the CV out.
Problems are as follows

a) It can be hard to tune to a exact note over a 5 octave range with a cheap
pot
b) they drift with temperature. Since they are used ratiometric this is
minimized to a degree.

What I am looking at is a Greyhill optical encoder. It is small, like the
black Spectrol pots I use now. It
is sealed. It outputs 256 pulses per revolution, nice and clean. And, (this
is the SEX part) it has a built-in
pushbutton integrated with the shaft! You push the shaft in about 1/16" and
it clicks like a mouse button!
If fact, this is the model they used: spin the knob, and click to set the
value. I LOVE this stuff!!

Of course, it is NOT cheap. If I buy 500 at a time, the cost to ME is about
$14 each. YEP! $14 EACH!!!!!!

But they are good for 5 MILLION rotations and the built-in button is just to
cool for words.

Paul S.


-----Original Message-----
From: Gur Milstein <gur-m@...>
To: motm@onelist.com <motm@onelist.com>
Date: Saturday, April 03, 1999 6:34 PM

Subject: [motm] Re: MOTM up date


>From: Gur Milstein <gur-m@...>
>
>Paul.
>please explain more about the sequencer desighn problem,why would
>quality components would make an analog sequencer better ?
>is it only the pots drift problem or are ther any other importent
>aspects ?
>
>thanx
>Gur Milstein
>
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>to digest, go to the ONElist web site, at http://www.onelist.com and
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>

Hi Paul, everyone:

I'd like to hear more about this sequencer!!! I remember when we talked about 
sequencers earlier, the price was about $450 for a 8X1 sequencer (you can't 
be using 16 of the optical encoders for a $450.00 sequencer)? Is this the 
"Mother Of All Sequencers" or one of the Daughters? It also occurred to me 
that you could combine Gur's ideas of cheap pots and a (chromatic) quantizer, 
to build a chromatic sequencer that wouldn't be affected by drift in the pots.

And while I'm not really in the market for a sequencer right now, $450 for a 
MOTM quality 8X2/16X1 sequencer seems like a very reasonable price!

Best,
John B.

JWBarlow@... wrote:
> And while I'm not really in the market for a sequencer right now, $450 for a
> MOTM quality 8X2/16X1 sequencer seems like a very reasonable price!
> 
I am!

I'm also getting ready to do major spring cleaning, so I can
get back to building my monster MOTM modular.

I've got lots of stuff to sell, anyone interested can email me
privately. I'm still working on the compiling the list.

Thomas

Paul.
i love this encoder pots idea,yes they do sound like the best choice
for a sequencer but they do cost LOTS of mony ,so:
may be you should think of two deferent perpouse sequencer.

1)the most chipe (i meen real chipe) sequencer 16/2 with the worse
pots you can find ,this sequencer would ONLY serve as a programer
of action in the system.
open/close of events just like the mute buton on the softwere sequencers.
it can allso be used for lots of non critical aplication in a system
and ther are lots of this aplication.
make it a 100$ sequencer in we are happy.

2)the second sequencer would be the "player machine".
it would be a 8/2 sequencer built with the great encoders and would
only be used for controling VCO'S, VCF'S or other 1V/OCT units.
but wait ther thats not all,ther should be a smart quantizer built
in the sequencer and a coperator and an acurate glide which is
triger by a toggle switch or an input.
the out put frome the encoder's are binery so a quantizer is the
right element to recive this codes and out put a voltage.
allso this quantizer should have an input so you could patch
in other stuff LFO,ADSR or the chipe sequencer.
allso make a pulse addres and other intresting inputs
and function's UP/DOWN ,RESET,PLENDIUOM,may be a digital memory bla bla
bla....
make it a 500$ sequencer and we done.

thanx
Gur Milstein


At 07:25 PM 4/3/99 -0600, you wrote:

>From: "Paul Schreiber" <synth1@...>
>
>A standard cheap seq uses cheap pots from +5 to ground to get the CV out.
>Problems are as follows
>
>a) It can be hard to tune to a exact note over a 5 octave range with a cheap
>pot
>b) they drift with temperature. Since they are used ratiometric this is
>minimized to a degree.
>
>What I am looking at is a Greyhill optical encoder. It is small, like the
>black Spectrol pots I use now. It
>is sealed. It outputs 256 pulses per revolution, nice and clean. And, (this
>is the SEX part) it has a built-in
>pushbutton integrated with the shaft! You push the shaft in about 1/16" and
>it clicks like a mouse button!
>If fact, this is the model they used: spin the knob, and click to set the
>value. I LOVE this stuff!!
>
>Of course, it is NOT cheap. If I buy 500 at a time, the cost to ME is about
>$14 each. YEP! $14 EACH!!!!!!
>
>But they are good for 5 MILLION rotations and the built-in button is just to
>cool for words.
>
>Paul S.
>
>
>-----Original Message-----
>From: Gur Milstein <gur-m@...>
>To: motm@onelist.com <motm@onelist.com>
>Date: Saturday, April 03, 1999 6:34 PM
>Subject: [motm] Re: MOTM up date
>
>
>>From: Gur Milstein <gur-m@...>
>>
>>Paul.
>>please explain more about the sequencer desighn problem,why would
>>quality components would make an analog sequencer better ?
>>is it only the pots drift problem or are ther any other importent
>>aspects ?
>>
>>thanx
>>Gur Milstein
>>
>>------------------------------------------------------------------------
>>To unsubscribe from this mailing list, or to change your subscription
>>to digest, go to the ONElist web site, at http://www.onelist.com and
>>select the Member Center link from the menu bar on the left.
>>
>
>
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