[sdiy] adv-midi / thomas henry / help

[Dave Magnuson]

Hi David,

I have an ADV-MIDI kit in my "to-do" pile... I could probably answer most of 
your questions for you.

According to the schematic you need a "gray code" encoder.   5 pins with the 
following pin-out:

Pin 1: Bit 3
Pin 2: Common (ground)
Pin 3: Bit 1
Pin 4: Bit 2
Pin 5: Bit 0

When viewed from the back of the pot, legs pointing at the floor, then pin 1 
is on the left.
The manual also says the part number is:  Clarostat 500EN-416P-B1

There are 2 spst switches:
S1 is omni mode on/off.  Switch open omni is on.  Switch closed the channel 
is set by the encoder.
S2 is Note range.   Open and it follows the GM soundset.   Closed makes the 
notes land sequentailly on the keyboard from notes 36 to 43.

Both switches short to ground when closed.

Dave Magnuson


----- Original Message ----- 
From: "david wright" <bastardita at hotmail.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, May 30, 2006 11:53 AM
Subject: [sdiy] adv-midi / thomas henry / help


> howdy folks
> a friend of mine passed on to me a midwest analog adv-midi
> midi 2 gate/trigger converter. i'm very excited as i have alot of  analog 
> drums
> but it is missing a few parts and i have no schematic.
> i do have the 'parts list and PCB reference' page - and so i've  figured 
> most of it out.
> my main question is it requires a 16-to-4 Encoding Rotary Switch, and  i 
> have no idea
> what that is. i vaguely know what a rotary encoder is. can anyone 
> recomend the
> correct one to get?
>
> would something like this work?
>
> http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail? 
> Ref=158296&Row=385607&Site=US
>
> also - the pcb and parts list two SPST switches. it doesnt really say  how 
> they are setup, any ideas?
> there are pads for S1 and S2 - maybe the other side goes to ground?  5v? 
> mystery!
>
> hell anyone have a schematic? :)
>
> thanks so much - i just want to drum without moving
>
>
> dave wright
> www.notbreathing.com
> bastardita at cox.net
>
>
>