Hi,
I got 32 channels of PWM using two tlc5940 connected to several
uln2003. Actually i found someone had a circuit diagram too.
Here we go. If you dont ever have all 100 on this might work using
some multiplexing too. There is a library for arduino written for this
chip. I can send you the code i used if you go this route.
Nicky
On 15 Jan 2009, at 14:39, Roman Haefeli wrote:
--- Dafydd Hughes dafydd61@gmail.com schrieb am Do, 15.1.2009:
Von: Dafydd Hughes dafydd61@gmail.com Betreff: Re: [PD] Pd, Arduino, and Multiple LED's == Installation? An: pd-list@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@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
--
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