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

[Roman Haefeli]

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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> 
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