[sdiy] touchplate keyboard - works!

[elmacaco]

And I was wondering you didn't do 16!!

Good job Peter, looks like too much fun.


----- Original Message -----
From: "Peter Grenader" <peter at buzzclick-music.com>
To: "Romeo Fahl" <rfahl at pdx.edu>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, February 05, 2005 1:29 AM
Subject: Re: [sdiy] touchplate keyboard - works!


> Believe it or not, those switches are made for wet weather applications.
> They make plastic ones for underwater use.  No moving parts. The company
is
> called Piezo, Inc, or something like that,  They cost a fortune - ten
bucks
> each.
>
>   Romeo Fahl wrote:
>
> > Are those elevator switches?  Where the heck does one buy something
> > like that, anyway?
> >
> > Romeo
> >
> > On Feb 4, 2005, at 8:35 PM, Peter Grenader wrote:
> >
> >> All,
> >>
> >> I've been working on something for myself on the weekends (i'm allowed
> >> to
> >> work on my own stuff on the weekends!) for a while now and I've
> >> finally got
> >> a camera to shoot a picture for you guys.
> >>
> >> It's an adaptation of a Serge Programmer circuit which appeared in
> >> SYnasple
> >> some three million years ago, with five stages instead of four and
> >> incorporating touchplates using those extremely cool piezo switches
> >> I've had
> >> laying around for a couple of years now, waiting to find the time to
> >> make
> >> this thing.  I also gave Smokin' Joe a proper home and slapped him in
> >> the
> >> corner (he being my joystick controller).
> >>
> >> Each key (stage) has the following inputs/outputs/controls:
> >>
> >> Send input (from the Sergecircuit - a pulse pulls the stage active)
> >>
> >> Gate output (remains high until another stage is selected)
> >>
> >> Pressure Output
> >>
> >> Voltage output (from the voltage level pot)
> >>
> >> Voltage Level Pot (sets the voltage output for that stage)
> >>
> >> LED indicator (lights when stage is active)
> >>
> >>
> >> The Summed Outputs consist of the following:
> >>
> >> Trigger out (marked gate on faceplate)
> >>
> >> Tuned Output ( the voltage pot outputs of the active stage)
> >>
> >> Linear Voltage  (outputs 2, 4, 6, 8 and 10 volts out of stages 1, 2,
> >> 3, 4
> >> and 5)
> >>
> >> Lagged Output (adds an adjustable slew to the tuned output)
> >>
> >> Summed Pressure output
> >>
> >> Lag Time/Pressure Sensitivity Pot (I used one dual pot for both
> >> features as
> >> I was out of faceplate real estate).
> >>
> >> Then there's Smokin' Joe - my Laughably Simple Joystick Controller
> >> flisted
> >> on my DIY page
> >>
> >> Wanna see a pciture?...
> >>
> >> http://www.buzzclick-music.com/motiv1.jpg
> >>
> >> This is one thing my system I was constantly wishing I had - a means to
> >> create manual independant triggers and voltage levels.   For those of
> >> you
> >> doing bug music that don't have a Serge Programmer or TBK or a Buchla
> >> Touchplate, you're kidding yourself thinking a keyboard with a Midi to
> >> CV is
> >> sufficient.  What I appreciate about this arrangement now is I can
> >> (finally)
> >> trigger independent events from each key.  Reaktor allows you to do
> >> this
> >> because it you can select a midi note number range for each module's
> >> input,
> >> however I was sick and tired of tying up my Event Timer in order to
> >> create
> >> Voltage threasholds to do this with my Midi to CV.  Now I don't have
> >> to.
> >> Yipp!
> >>
> >> And in that I retained the Serge 'send' input to each stage, this
> >> module can
> >> become a arbitrary voltage generator or a sequencer if driven form a
> >> pulse
> >> sequence.
> >>
> >> Here is a close up of the piezo switches I used for the touchplates:
> >>
> >> http://www.buzzclick-music.com/piezo.jpg
> >>
> >> I'm glad this one is completed, it was a ton of work!
> >>
> >> - P
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> Along with the touchplates, I added a linear voltage output (gives 2,
> >> 4, 6,
> >> 8 and 10 volt outputs out of the five keys), a tuned output, which is
> >> the
> >> summed output of the voltage pots, a lagged output which slews between
> >> those
> >> tuned voltages
> >>
> >
>