[PD] Pd, Arduino, and Multiple LED's == Installation?

[Roman Haefeli]

--- Dafydd Hughes <dafydd61 at gmail.com> schrieb am Do, 15.1.2009:

> Von: Dafydd Hughes <dafydd61 at gmail.com>
> Betreff: Re: [PD] Pd, Arduino, and Multiple LED's == Installation?
> An: pd-list at iem.at
> Datum: Donnerstag, 15. Januar 2009, 15:12
> Hey Kyle
> 
> Sounds like a really cool project.
> 
> Are you sure you need any special hardware at all? You
> could use the
> PWM out from the arduino and a transistor for each set of
> LEDs you
> want to control then build an array. A friend just showed
> me this
> ridiculously cool site: http://led.linear1.org/led.wiz
> 
> I'm talking like I've done this before, but really
> I'm only part way
> through a similar process, so maybe it's all totally
> wrong:) Anyway,
> hope it helps.
> 


i think, i'd do it the same way. i've done it before, but not in that large scale.  Of course, one could purchase an expensive professional coloured Ligthing-LED-System with very expensive dimmable power supply units and sophisticated control-protocols such as DMX or DALI or whatsoever, but when not being afraid of a little soldering, you could achieve pretty much the same with anarduino, a handful of electronic pieces and plain LEDs from your local electronic store. actually, when using an arduino it is pretty straightforward to do something like that.

i wouldn't use common transistor fors driving the LEDs. i'd rather go for MOS-FET transistors. you could drive a whole bunch of LEDs with one MOS-FET and they draw nearly no current from the arduino digitalOut. also, as long as you work with low-voltage, you don't necessarily need de-coupling such as opto-coupler or so.

roman
> 
> On Thu, Jan 15, 2009 at 12:01 AM, Kyle Klipowicz
> <kyleklip at gmail.com> wrote:
> > Hello Listers~
> >
> > I'm working on an art gallery installation and I
> want to use Pd to control
> > some high-powered LED's via an Arduino unit.
> >
> > The breakdown is this: I need to create a series of
> RGB LED's that will
> > provide accent illumination to the gallery space, and
> shifts from red to
> > blue over a course of 6 weeks. The program isn't
> very difficult to write.
> > I've already decided to link it to the system
> date/time so that the
> > installation can be powered down easily at night.
> What's tricky is knowing
> > what hardware to use and how to get it together. I am
> going to want between
> > 25-100 lights at minimum, possibly more.
> >
> > I've looked at a few sites and links already,
> especially the Arduino site.
> > They have some things related to DMX lights, and this
> is something I've seen
> > a bit on the list as well. I don't know if this is
> a good solution or if it
> > is overkill for what I want to do.
> >
> > One piece of hardware that seems promising is the
> ShiftBrite
> > (http://www.macetech.com/blog/node/54). Does anyone
> know about this?
> >
> > I know this might  be considered off-topic, but
> I'd really appreciate it if
> > any seasoned veterans could throw me some tips.
> I'll be exploring other
> > areas, but I know there are some honed brains skimming
> these emails so maybe
> > they can drop some science on me.
> >
> > Thanks in advance,
> >
> > ~Kyle
> >
> > --
> > -----
> > ------------
> >    ----     -----
> > ---- -------- - ------
> > http://perhapsidid.wordpress.com
> > http://myspace.com/kyleklipowicz
> >
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