[sdiy] ICL8038 VCO?

[Bob Weigel]

Nice.  Chris...btw do you need a new key for that thing? :-)  I'm 
curious if the CS-10 takes the CS-20M/CS-15 etc. keys or the earlier 
CS-60 etc. keys. I think we only have a guess so far on that one.   Yeah 
my thought on most function generator type chips is that they're 
probably best suited for LFO applications but good to hear someone has 
actually done that and gotten it working ok!  -Bob

Chris Strellis wrote:

>Hi Richard,
>
>I built a second Osc for my Yamaha CS-10 using one back in 1994.  I used the Sine output and also the square out plus three square sub-octaves using a CMOS counter running at 15V.  The four octaves of square are mixable too.  There are five footage settings and a fine tune.  
>
>It works well, the chip gets hot though and it isn't fantastically stable but works well enough.
>
>You can see it here:
>
>http://www.strellis.com/sdiy2004.html
>
>I showed it at Synth DIY UK 2004. It's the unlabelled(!) bolt on box on the side :)
>
>The Yamaha synths of this era have Hz/V outputs which means you can use a linear VCO - no need for a lin to expo converter :D
>
>Cheers
>
>Chris
>
>
>
>  
>