[sdiy] VC pedal

[harrybissell]

LOL.  I made one of those (VC pedals) as well... from an old

MOOG 1120 Control Pedal  (now what do you think THAT would be
worth, stock, today... well you know what I say, "I bought it, I'll
bloody well boot it"    :^)

I was trying to get a very fast response for the high-hat "splash"
sound, as well as foot closed. So my optical gate is closed when the pedal
is up, and the cell is suddenly illuminated at the full down.  I do get some
"analog" range but that is not my intent.

I used an LM334 to drive the LED constant current from a 9V battery. It can
suck the cell down to less than 7V before it suddenly dies.

I have some very strong springs inside the case... so there is some feel. I can
see the Peasant's design is far beyond mine in authentic 'feel' department.

yo' mssr. Peasant:  Did you do anything to model the inertia of a real hi-hat.
The
cymbal mass gets quite an acceleration when you slap it down with the foot. Are
you
trying for 'real feel' or synth controller ?   I did not bother with that.

yo' mssr Tim:  For your 'maracas' (which I also experimented with) I would look
into the Analog Devices ADXL-202E accelerometer.  It can do what you imagine
far better than an opto circuit will...  you should be  able to get samples.  I
built it
'deadbug' on a small circuit board.  I was trying for "electric sneakers" to
play drums
with my feet... but I did not have great success.  I did try the maracas
thing... but I am out
of extra appendages.   Of course there is an old saying "Maybe I should stick a
broom up
my ... and sweep the floor at the same time ???"

now THAT might 'shake' things up a bit...

H^) harry

Tim Parkhurst wrote:

> Doug, that is super nice! I'm impressed with your mechanical work. What sort
> of metal working / cutting tools do you have in your shop?
>
> I also like the opto sensor and the "V" gated shutter. Something similar
> might make a neat aftertouch sensor, or a neat hand-held percussion
> controller gizmo (velocity sensitive electro-maracas, anyone?). Anyway,
> great stuff!
>
> Tim (there's a maraca joke in here somewhere) Servo
>
> "Imagination is more important than knowledge." - Albert Einstein
>
> *************************************************************
> > -----Original Message-----
> > From: The Peasant [mailto:ecircuit at telus.net]
> > Sent: Wednesday, September 15, 2004 9:29 PM
> > To: synth-diy at dropmix.xs4all.nl
> > Subject: [sdiy] VC pedal
> >
> > Hello Everyone,
> >
> > If any of you are interested, I have finally been able to put together a
> pedal
> > to control the hi-hat for the drum synthesizer. It's an optical pedal that
> > outputs 0 - 5 volts.
> >
> > http://www.electronicpeasant.com/projects/vcpedal/vcpedal.html
> >
> > Take care,
> > Doug
> > ______________________
> > The Electronic Peasant
> >
> > www.electronicpeasant.com
> >
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