[sdiy] DR110 repaired, possible trigger ins?

[Theo]

When there is a trigger button available its always saver to use indirect
triggering.
Try connecting Cmos switches 4066 (4x single pole) or 4053 (3x dual pole)
parallel to the switch contacts.
Should work in your case.
If not it might be that the gate pulses are too short.
Making the pulses longer is not too hard but maybe try adding the switches
first.
Make sure the Cmos ICs can handle the voltage used in the circuit.

HTH
Theo




----- Original Message -----
From: Rude 66 <r.lekx at chello.nl>
To: Metrophage <c0r3dump23 at yahoo.com>; <synth-diy at dropmix.xs4all.nl>; Dave
Magnuson <resfreq at hoohahrecords.com>
Sent: Tuesday, May 04, 2004 2:21 AM
Subject: Re: [sdiy] DR110 repaired, possible trigger ins?


>
> hmm, this got me thinking. i've been trying to trigger the drum sounds of
my
> maestro rhythm king from the outside. this thing has no schematics and is
a
> jungle of old wiring and discrete parts inside. i'd love to find some
> trigger in for the rhythms to be synced, but there's no way finding it by
> poking around. this is no 606: it's the size of an old radio.
> however, it has trigger buttons for the sounds on the front. they're
simple
> springs; the middle one is held against the outside one when the button is
> untouched. if you push it, you push the middle one to make contact to the
> inside one and the sound is triggered. i've tried every conbination, but i
> can't get them to respond to a trigger from something like an 808. could
> this be the reason?
>
> r./
>
> btw the idea of a dr110 in a 707 housing is excellent!
>
>
>
>
>
> > A positive trigger or gate will not work on the DR-110.  The trigger
lines
> > are held high (+6v) and shorted to ground to make the voice sound.  I
used
> > a "gate to s-trigger" circuit like this one:
> > http://www.doepfer.de/faq/gen_faq.htm
> > which allowed me to use positive-going gates to trigger the voices.
Works
> > great. I connected the collectors of the transistors  to the trigger
lines
> > into the voice board (I connected them to the former ribbon cable
> > location).  I then connected the emmiters to ground as shown in the
> > schematic.
>
>
>
>