[sdiy] 566 , was Re: Midwest Analog Product Books

[Tim Parkhurst]

> -----Original Message-----
> From: Metrophage [mailto:c0r3dump23 at yahoo.com]
> Sent: Monday, September 27, 2004 3:50 PM
> To: john mahoney
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] 566 , was Re: Midwest Analog Product Books
> 
> I'd say it's good for anything which doesn't need to scale or have a
> huge range. LFOs and percussion oscillators come to mind. The latter is
> what Tom says he uses them for.
> 
> The Gnome uses funky old NPN and PNP transistors like those in the 27XX
> modules. I might make a Gnome for my son one of these days!
> 
> CJ
> 
> 
> > > > oft-maligned chips in some grab bags. (Not 556, not 565, but the
> > > > obsolete 566 VCO/Function Generator.)
> > > Speaking of which,  I got one of those chips too,  in a similar
> > situation --
> > > in a bag of miscellaneous parts.  What's it good for?
> >
> > Short answer: a sound effects box like the old Paia Gnome.
> 


Actually, the Gnome makes rather clever use of the also oft-maligned LM3900
(along with a few discrete transistors). Check the 3900 data sheet and the
Gnome schematics for some interesting lo-fi ideas.

For the data sheet and app notes (check out AN-72)
http://www.national.com/pf/LM/LM3900.html

Gnome schematics
http://www.paia.com/fotoalbm.htm



Tim (still listening to The Aquabats) Servo
 

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