Analogue-sequencer

>> Question 3, for builders of kits in the United States: what 
>> is the total
>> parts cost, more or less? I realize this varies with choices 
>> of panels,
>> pots, knobs, etc.; I'm just looking for a ballpark estimate 
>> (as we say in
>> this country).
>
>I leave that one hopefully for a recent US builder with his credit card
>statement handy...

Still looking for all the parts, so far ive spent around 100$ US, but still need a few more items...

Any other US builders able to find all the parts from 1 or a few sources, Ive been hunting around all over the place, but have found most pieces....
When I am done I'll get some exact numbers, and from what sources...

-JC
  ----- Original Message ----- 
  From: Colin f 
  To: analogue-sequencer@yahoogroups.com 
  Sent: Monday, January 09, 2006 12:35 PM
  Subject: RE: Newbie questions in RE: [analogue-sequencer] Important: P3 Kits to be discontinued



  > I *just* joined this mailing list a day or two ago, so that I 
  > could learn
  > more about the P3. I am particularly interested in the kits, so the
  > announcement of their discontinuation has me slightly 
  > disconcerted. :-)

  It's a feeling you may get used to if you're doing much electronic work.
  I've just found my usual supplier doesn't even carry 16 pin DIP sockets any
  longer...

  > Question 1: do the kits come with schematics?

  Schematics are available from the Sequentix site.
  Come to think of it, they might not be quite up to date, so I'll make a note
  to check.
  But schematics are freely available.

  > Question 2: is the software "open source"?

  No, the source is not available.

  > Question 3, for builders of kits in the United States: what 
  > is the total
  > parts cost, more or less? I realize this varies with choices 
  > of panels,
  > pots, knobs, etc.; I'm just looking for a ballpark estimate 
  > (as we say in
  > this country).

  I leave that one hopefully for a recent US builder with his credit card
  statement handy...

  > Question 4: I personally would prefer endless rotary encoders 
  > rather than
  > potentiometers. I see that there has been some discussion of 
  > this in the
  > past. What is the feasibility for a kit builder to convert 
  > their unit to
  > encoders? I can do some amount of digital circuit design, can 
  > lay out my own
  > PCBs, write microcontroller firmware, etc. (To some extent 
  > this hinges on
  > the answers to questions 1 and 2.)

  The current pot scanning hardware has a latch to select which pot is to be
  read, a line to strobe the analogue to digital convertor to start
  conversion, and another to read the value.
  It would be possible to use a PIC microcontroller in place of the A to D
  convertor circuit to emulate pots using rotary encoders.
  This would need some software support to provide the encoder processor with
  the current positions of the pots it's going to emulate, but that could be
  done by writing the current 'position' value to the A to D convertor address
  when starting each 'conversion' - this address is not used in the existing
  hardware, so a write to it would have no effect.
  This is not a project I have time to deal with myself, but I'd be happy to
  advise on it for anyone desperate for encoders...

  Best regards,
  Colin Fraser
  Sequentix Music Systems Ltd
  http://www.sequentix.com




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