[sdiy] 566

[Tom Arnold]

On Tue, Jan 27, 2004 at 05:03:51PM +0100, jbv wrote:
> > Do you mean the 556 (dual timer)?  566 is anything but cheap
> > now that it's transmuted into an isotope of unobtainium.
> 
> I really mean the 566...
> A few months ago I got 40 pcs on ebay for less than $30...

If you get the Midwest Analog booklet about the 566 it has about everything
you'd need to make a tolerable VCO.
Some thoughts : 1. He points out it goes a little flat across its range and
sure enough it does.  Maybe some more tweaking could even that out, but it
will increase the partscount.  2. By the time you do make it wide range it
starts to get sorta high in the parts count catagory anyway.

Once I get to it, I'm going to build a few VCOs just to have them around,
but I'm not going to go crazy building them like I had planned.  I'm more
going to use them for various "weird" things that come up, like drum voices
( also Thomas Henry designs ) and the like, and go for 4069 based VCOs
because they are insanely cheap and simple to make.

I've been specifically looking at the building lots of small cheap VCOs for
a project.  I have a board layout mostly done for a 8 voice 4069 VCO board
which I'll build 8 of.  Long story why, maybe I'll get it done enough to
talk about. :-)

-- 
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 - Tom Arnold -       When I was small, I was in love,                  - 
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