[sdiy] touchplate keyboard - works!

[Oren Leavitt]

Peter,
That looks awesome!
Great job.

Thanks for sharing the update,
Oren

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
> 
>