[sdiy] DR110 repaired, possible trigger ins?

[Dave Magnuson]

At 02:21 AM 5/4/04 +0200, Rude 66 wrote:
>
>
>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./
>
>

I'd definitely try it... it works great on the SR-110, and may work on the
rhythm king!  Maybe the normally closed contact is a pull-up or pull-down
voltage?  Then the Normall open contact will be the reverse?  You should
get in there with a voltmeter and see if you can find a DC voltage on one
of those 2 contacts.

Dave

Resonant Frequency:
resfreq at hoohahrecords.com
http://www.hoohahrecords.com/resfreq/index.html