[PD] electro-mechanical piano (player piano) - Arduino, Solenoid Issue

[Epic Jefferson]

Alexandros and Roman:
Thanks, i'll check both of your suggestions. I'll let you know how it goes.

I also just ordered a Practical Maker PWM shield for arduino UNO. 1 shield
gives you 32 pwm pins and they're stackable, up to 6 without the need for
an external power supply.
http://www.practicalmaker.com/products/arduino-shields/pwm-shield-assembled


On Wed, Jun 26, 2013 at 5:58 PM, Roman Haefeli <reduzent at gmail.com> wrote:

> I once hacked together a small Arduino firmware and corresponding Pd
> abstraction, that does just that. You send the pin number and the duty
> cycle and the firmware manages the timing of the duty cycle. The
> advantage is that the timing is much more precise compared to sending
> both on and off commands over the serial link. This might allow for some
> velocity control.
> The abstraction and firmware does not address multiplexing/daisy
> chaining. But probably it is still useful as a starter.
>
> Roman
>
> P.S.: I haven't the had the chance to really test the help-patch. Just
> rant if something is not working as expected or unclear.
>
> On Mit, 2013-06-26 at 20:00 +0200, batinste wrote:
> > That is one of the many cases where my advice would be : don't use
> > firmata/pduino. Program the arduino for real. Use a basic custom
> > protocol over the serial link, and talk to the arduino with [comport].
> > You'd spend much more time trying to get it to work with
> > firmata/pduino than programming the 'duino and let it do the real work
> > instead of clogging your serial port.
> >
> > On 26/06/2013 16:56, Epic Jefferson wrote:
> >
> > > Charles Z Henry & batinste:
> > > I need the project to be pd controlled, i could try multiplexing but
> > > i haven't found info yet on how to control multiplexed pins via pd.
> > >
> > >
> > > Peter Venus:
> > > i've been in contact with Winfried, and was about to purchase one of
> > > his older systems but haven't heard from him in a while. Working on
> > > plan B.
> > >
> > >
> > > Olivier:
> > > that was good work but again, pd is a must and servos are extremely
> > > loud.
> > >
> > >
> > > Charles Goyard:
> > > i've been able to control solenoid velocity with pwm via pd, this is
> > > also how Winfried does it. Also, motors are way too loud, as I told
> > > Olivier. That's why i'm investigating daisy chaining the arduinos,
> > > i'm basically emulating Winfried's system, but replacing his Escher
> > > micro-controller with arduino Mega's.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
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-- 
www.epicjefferson.com
www.avmachinists.org Puerto Rico based Art Collective/ Non-Profit Org
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