[sdiy] mm5837 are all over the place!

[Ray Wilson]

I have posted a cool circtuit that gives rail to rail digital noise and
works with a lowly 2N3904. Check it out.

http://atlas.csd.net/~rjwsoft/multinoisemodule_exp.html

It takes a couple of parts and a  dual op amp and BAM you get all the high
amplitude non-cyclic noise you want. The upper left corner of the schematic
is the noise generation part.

Ray


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Harry Bissell Jr
Sent: Friday, October 10, 2003 8:53 AM
To: WeAreAs1 at aol.com; synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] mm5837 are all over the place!


I did a longer shift register in my Prophet V...
the amplified noise transistors would have had a
vastly different amplitude (not digital with rail to
rail swings) and messed up the factory patches.

H^) harry

--- WeAreAs1 at aol.com wrote:
> I'm guessing that the majority of MM5837's were sold
> to drum machine makers.
> That is, organ manufacturers who had beat boxes
> built into their organs
> (Thomas, Lowery, etc.).  If you're just using it to
> make "snare drum" and "hi hat"
> noise, with short little decay envelopes, then the
> cyclic pattern repetition
> would not be much of an annoyance.  On the other
> hand, in synths?  Shame on
> Moog, Sequential, and everyone else who wussed out
> and used those in their synths
> instead of amplifying selected noise transistors.
>
> Michael Bacich