V/Oct scaling with 566 VCO

[theinmans at mindspring.com]

DCMagnuson at aol.com wrote:
> Hi List,
 Anyone know of a schematic online that uses the 566?

After a recent discussion of its use as a VCO for a noise source,
Mike Bacich posted his redrawn Tom Henry circuit for the benefit
of all (Thanks, Mike!):

http://members.aol.com:/mikebacich/diy/tomhenrynoise.htm

Although the CV inputs are "random" here, the CV scaling can be used
for regular 1/v per octave VCO.  

If you want to search the archives for more info, the conversations 
about the chip took place about August 19th of 2000.  Of course, the 
chip was actually discussed a number of years ago.  See 6/29/1998 to 
7/01/1998 and again on 7/07/1998 when Rene Schmitz announced that he 
was posting a schematic showing how to use it as a wide-ranging VCO.  
I just tried that link.  Dead, alas.  Note as well that TH credits 
John Simonton for inverting the power supply to the 566, thus allowing 
its use as Mike has it drawn in the link above.  This, of course, 
makes this the most honest VCO ever drawn -- what with everybody 
thanking everybody else and almost no one claiming credit!

I love this little chip.  I just had the silly thing on the
breadboard and was watching the signals on the oscilloscope 
while listening over the speakers an hour ago.  Fun stuff.  

The chip is now obsolete, but is still readily available, albeit 
at increasing prices.

Elliot