[sdiy] Yamaha Breath Controller Question

[Ian Fritz]

At 05:22 AM 8/5/2004, Chris Share wrote:

>I'm interested in using a Yamaha Breath Controller (BC3a) for
>controlling a software synth.......
> From what I've been able to find out on the web, the device needs to be
>powered. Does anyone know what voltage/current it requires (and the
>configuration)? Also, does anyone know anything about what it actually
>outputs--is it a CV? If so, what is the approximate range?


Chris -- It has somewhat of an odd setup.  It is powered between gnd and 
-15V.  (Sleeve = gnd, tip = -15)  The output (ring) is around 0 to 
-12V.  You run it into an inverting opamp to get 0 to whatever positive CV 
you want.  The BC circuit uses two dual opamps and an IC pressure 
sensor.  I don't have information on the current draw.  I might be able to 
find some links for you if you need more info.

   Ian