Cgs synth

thanks Mark,

I found the triggers via an LED with 2k res. to ground. pooked the
positive leg on the pcb traces until it lite or flashed. The
brightness was pretty good. When the led was on the triggers for the
hi hat, the sound of the hi hat changed, closed hh and conga were
not affected. I think they are positive pulses? An OR gate would be
right.

maybe a simple PNP tranisotr? next is to get the pulses up to at
least +5v, right?

thanks for your suggestion!

JEff

--- In cgs_synth@yahoogroups.com, Mark <yahoogroups@...> wrote:
>
>
> Imho, the first step would be to figure out what sort of signal you
> have. Is it a positive voltage, negative voltage, or a collector??
> What is producing it or what is it driving?? From that you can get
> an idea how much current it can sink or source. Then that will
tell
> you what sort of buffer you might need.
>
> As far as being able to find a trigger that occurs on every 16th,
you
> can OR them together (using diodes or logic).
>
> On 7/2/08, Jeff Foster put forth:
> >hi folks,
> >
> >general interfacing question.
> >
> >I would like to drive my sample and hold
> >modules from my casio mt-68. The casio has analogs drums and I
have
> >found on the pcb the clock signals for the open and closed hi-
hat.
> >I figure this will give me 16th notes which can be
> >divided down for other division if needed. although not all
patterns
> >use HH. might add in the conga hit as well.
> >
> >I image some type of buffer circuit is required to interface the
> >clock with the trigger in on the s/h?
> >Would the "Dev-mod Gate/Trigger block" of Ken's work(CGS69)? would
> >also like to run it off of single supply (casio is 7.5 or 9v).
> >Maybe simple transistor buffer is all that is needed? I was
thinking
> >a transistor "AND" gate and tie one side high and then feed the
> >casio triggers to the other side. would that be enough to get a
> >clean triggers with out loading down the casio logic ?
> >looking for simple, single supply soultion.
> >suggestions?
>