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
<<inline: circuit.png>>
On 15 Jan 2009, at 14:39, Roman Haefeli wrote:
--- Dafydd Hughes <[email protected]> schrieb am Do, 15.1.2009:Von: Dafydd Hughes <[email protected]> Betreff: Re: [PD] Pd, Arduino, and Multiple LED's == Installation? An: [email protected] 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.romanOn Thu, Jan 15, 2009 at 12:01 AM, Kyle Klipowicz <[email protected]> wrote:Hello Listers~ I'm working on an art gallery installation and Iwant to use Pd to controlsome high-powered LED's via an Arduino unit. The breakdown is this: I need to create a series ofRGB LED's that willprovide accent illumination to the gallery space, andshifts from red toblue over a course of 6 weeks. The program isn'tvery difficult to write.I've already decided to link it to the systemdate/time so that theinstallation can be powered down easily at night.What's tricky is knowingwhat hardware to use and how to get it together. I amgoing to want between25-100 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 thisis something I've seena bit on the list as well. I don't know if this isa good solution or if itis overkill for what I want to do. One piece of hardware that seems promising is theShiftBrite(http://www.macetech.com/blog/node/54). Does anyoneknow about this?I know this might be considered off-topic, butI'd really appreciate it ifany seasoned veterans could throw me some tips.I'll be exploring otherareas, but I know there are some honed brains skimmingthese emails so maybethey can drop some science on me. Thanks in advance, ~Kyle -- ----- ------------ ---- ----- ---- -------- - ------ http://perhapsidid.wordpress.com http://myspace.com/kyleklipowicz _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list-- www.sideshowmedia.ca skype: chickeninthegrass _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list_______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
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