[sdiy] Trigger delay schematics

[media.nai at rcn.com]

>Does anyone know of any schematics for a trigger delay circuit?  This would
>be used where a trigger signal would be used to drive two separate VCA
>envelope generators with one sligtly later than the other to create a sort
>of echo effect.  Ideally, the delay would be variable.
>
>Could one of the bucket-brigade digital delay chips be used?

If you only want to delay a trigger (and not a gate), this could easily be
done with a 555 timer with a pot set to control the delay time.  If you
want voltage control, you can try using a vactrol.  There is all sorts of
555 stuff on the web, including animated cartoons and free calculator
software.  Check it out :)  You can also make a gate delay that preserves
pulse width using 555's, but it will have a number of restrictions.