[sdiy] xr2206

[Adrian Corston]

That XR2206 design would be very similar in complexity to an
8038-based one.  The 8038 datasheet is worth reading and prototyping
on a breadboard to learn more, and those chips are much more readily
available than the XR2206.

For low-ish distortion (1%) on tri-to-sine it's not too hard and there
are good designs out there that shouldn't be too hard find with a bit
of googling.  For a 'noise box' I think that would probably be just
fine.

To get better than 1% you might find it easier to use a
self-oscillating filter instead.

Cheers,
A.

----- Original Message -----
From: "Jean Bender" <lofideadbeat at gmail.com>
To:"Adrian Corston" <eidorian at aladan.net>
Cc:"SDIY" <synth-diy at synth-diy.org>
Sent:Mon, 27 May 2019 08:52:59 +0200
Subject:Re: [sdiy] xr2206

 Hi !
 thanks for your answers.
 I was looking for a simple sine generator design, for building a
 specific noise box. this schematic was talking to me a lot :
 https://www.sonelec-musique.com/images2/electronique_gene_audio_009b.gif

 I gonna look after the others chips, maybe a 555 or 4046 would be a
 good start, easy to find and cheap, but i would need a good tri to
sin
 converter.
 I'd like to have a good sine shape, with low distortion...

 Also, maybe using a LM13700 would be an idea ?

 Best,
 J.

 Le lun. 27 mai 2019 à 06:20, Adrian Corston <eidorian at aladan.net> a
écrit :
 >
 > There are many options if you're willing and able to redesign the
circuit.
 >
 > e.g. 8038, 566, 555, CEM3340, 4046, 40106, XR4151...
 >
 > Cheers,
 > A.
 >
 >
 > ----- Original Message -----
 > From: "Ben Bradley" <ben.pi.bradley at gmail.com>
 > To:"SDIY" <synth-diy at synth-diy.org>
 > Cc:
 > Sent:Sun, 26 May 2019 23:06:08 -0400
 > Subject:Re: [sdiy] xr2206
 >
 >
 > There was a thread here over a year ago with subject "NE566 Boon"
that
 > discussed the "current" XR2206 - the original was discontinued
years
 > ago, but there are many small function generator kits on ebay
 > featuring the XR2206 - it seems that THESE are not the same, and
don't
 > work with a power supply above 11V or so. If that's okay with you,
 > maybe the ones in the kits will work for you. About the only way to
 > get a "real" one is buy a used device (a small function generator)
 > from a decade or more ago that used a XR2206, I suspect there are
 > several brands and models of small, inexpensive function generators
 > that used the XR2206. Either of these is a bit of an expensive way
to
 > get the chip.
 >
 > I'm pretty sure there'a no alternative (as in direct replacement)
for
 > the XR2206.
 >
 > Do you have a design you want to make that uses the XR2206?
 >
 > On Sun, May 26, 2019 at 9:06 PM Jean Bender
<lofideadbeat at gmail.com> wrote:
 > >
 > > Hi SDIY list !
 > >
 > > I'm looking for buying some XR2206 ics, and i'm bit lost, as it
seems
 > > they are no more produced.
 > > Would someone knows a good supplier which could still sell some
proper ones ?
 > >
 > > Is there any good alternative ic i could go for actually ?
 > >
 > > Thanks !
 > > J.
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 -- 
 Jean Bender

 Hak Lofi Record


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