Really Basic Question

[Mark Havard-Brown]

Gavin,

Check out the Modulus site at
http://www.geocities.com/SiliconValley/Park/2707/ a comparator circuit
(amongst other things) can be found in Modulus 4. The info is in PDF format.
I will email you the PDF file directly.



Mark.

-----Original Message-----
From: Gavin Muir <gmuir at sympatico.ca>
To: synth DIY <synth-diy at mailhost.bpa.nl>
Date: 06 February 1999 17:48
Subject: Really Basic Question


>Hi all,
>
> My experience in electronics is limited to working with existing designs,
>as my theoretical knowledge is next to nil. I am however trying to learn
>myself on a few things, thus my interest in putting some modules together.
>
> I don't yet have a MIDI to CV converter, and would like to hold off as
>long as possible by focusing my efforts on projects like a moog filter, or
>some of Tom G's filters, which I could then run my analog poly-synths
>through. This would pretty much limit my requirements to a power supply, a
>couple simple EGs, a VCA and the filters themselves, which suits my degree
>of adventure right now. So, to my question...
>
> Is it possible to build a simple comparator device which would trigger a
>gate signal when the threshold (incoming audio, threshold set with a pot)
>is crossed? I understand basically what a comparator does, and I have a
>couple circuits for envelope followers which include this feature, but I
>really would prefer not to have to lay out a board for a whole envelope
>follower if I don't have to (I have no idea how to even START laying out a
>board!). It seems to me this should be a fairly easy thing to do, but then
>again, I don't know too much about these things!
>
>Cheers,
>Gavin Muir
>