[sdiy] Another new hard to find part....

[James Patchell]

Recreating the 74HC283 with "discrete" circuitry, while an interesting 
exercise, would be problematic...i.e...way too many parts.  I could 
recreate the functionality with a CPLD, like say a Xilinx XC9536, but the 
advantage of using standard "ttl" (really CMOS) functions is that anybody 
can build up the circuit.  So far, I have done only one project that had a 
PLD in it, and that was because size dictated.  Most people do not have the 
ability to program the chips, so, if I can, I avoid them.  One big 
exception are micro controller chips....there are no substitutes...

At 11:31 PM 7/4/2004 -0500, Wood wrote:
>isnt there the option of recreating these with discreate circuitry?
>----- Original Message -----
>From: "Scott Gravenhorst" <music.maker at gte.net>
>To: <synth-diy at dropmix.xs4all.nl>
>Sent: Sunday, July 04, 2004 10:26 PM
>Subject: Re: [sdiy] Another new hard to find part....
>
>
> > Apparently, we are the keepers of this vanishing technology.  (I remember
>the
> > book/movie "Fahrenheit 451")...  I, for one, will be "hoarding" a certain
> > selection of parts as soon as I find a job.  This feels like a bad dream
> > (nightmare).
> >
> > What I really hate about this is that mainstream electronics tends toward
> > digital microprocessor methods which don't seem to yet be able to do what
> > simple analogue circuits can do for music.  When analog is finally gone,
>will
> > the digital domain be able to satisfy our musical demands?  So far, it
> > doesn't look that great, IMHO.
> >
> > James Patchell <patchell at cox.net> wrote:
> > >I just placed an order for parts for my sequencer....of all the things
>that
> > >I did not think would be hard to get, a regular 74HC283 in a dip package
>is
> > >no longer stocked by either Digikey or Mouser.  They are now special
>order
> > >with them....even digital crap now is starting to be difficult to get....
> > >
> > >Also just realized I forgot to order CA3080's....well, I do have some
> > >really old ones somewhere around here...
> > >
> > >
> > >         -Jim
> > >***************************************************************
> > >http://www.oldcrows.net/~patchell
> > >
> > >***************************************************************
> > >
> > >
> >
> > ---------------------------------------------------------
> > - Where merit is not rewarded, excellence fades.
> > - Hydrogen is pointless without solar.
> > - What good are laws that only lawyers understand?
> > - The media's credibility should always be questioned.
> > - The only good terrorist is a dead terrorist.
> > - Governments do nothing well, save collect taxes.
> >
> > -- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
> > -- Linux Rex         | RedWebMail by RedStarWare
> > -- FatMan: home1.gte.net/res0658s/FatMan/
> > -- NonFatMan: home1.gte.net/res0658s/electronics/
> > -- Autodidactic Master of Arcane and Hidden Knowledge.
> >
> >

         -Jim
***************************************************************
http://www.oldcrows.net/~patchell

***************************************************************