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16  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: September 18, 2012, 03:53:42 am
Here is the final product built at Burning Man 2012 located at 4:45 and H

I took most of the video on the last day and by then it had some flickering issues that you may notice due to a signal wire connector but overall it turned out pretty good without any problems with electronics.

 
http://youtu.be/g1FfAFCeG-Y
17  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: July 31, 2012, 12:30:01 am




I designed a pcb for this and it works great. Going to make my dome fully fiber optic and it will be at burning man this year. Here is a pic of it with just the UV string smiley-grin
18  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: July 24, 2012, 05:31:47 am
Hey everyone check out how my fiber optics turned out inside my dome with UV string as well.

http://kck.st/PO6zlJ

~Krolo~
19  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: June 01, 2012, 03:41:20 am
Yes that is the same circuit i used and it works nicely. As Mike said make sure you use a good power source such as a computer power supply that has the 5v and 12v readily available.
20  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 22, 2012, 12:32:01 am
As far as calibration without an oscilloscope goes I should be able to play a sine wave respective to the frequency being passed, then slowly turn up the pot and print the analog read out to the serial line. Or could I use a volt meter with respect to ground (or vground?) and read it as the RMS value and adjust it for P-P value?
21  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 20, 2012, 07:26:33 am
Here it is wired up with the fiber optic. I can't wait to program morepatterns



https://www.youtube.com/watch?v=WaFdIu16Cco&feature=youtube_gdata_player

22  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 18, 2012, 04:09:04 am
Isn't that what the 1N4002's would be connected to?
23  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 18, 2012, 03:03:50 am
the 11 and 4 pin are for IC1

The only thing i'm not too sure on is how to calibrate for the input analog range of 0-5v for the arduino without an oscilloscope. Will the 20k pots be enough? Will this circuit produce  wave forms 0-12v?or ??
24  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 18, 2012, 02:26:17 am
Alrighty, I wanted to add a color organ to this beast. I was thinking on using this circuit and instead of the 3904's just connect to the input of the analog inputs.
 


I figured the code would go something like:

value1 = analogRead(pin);

if (value1 > somearbitrarynumber){
Tlc.set(0, 4095);
}
if (value1 > someothernumber){
Tlc.set(1, 4095);
}
...etc

Or maybe something like this:

value1 = analogRead(pin);
value2 = analogRead(anotherpin);
power = value1 * multiplier;     //(multiplier most likely will be 4)
power2 = value2 * multiplier;
 for (int channel = 0; channel < 16; channel += 1) {
     
     Tlc.set(channel, power);
      }
 for (int channel = 16; channel < 32; channel += 1) {
     
     Tlc.set(channel, power2);
      }

In that schematic I found i'm not sure what the pin 11 and pin 4 connected to vcc and gnd are going to. I'm assuming I can ignore it. I'm also assuming 12v is VCC.

I'll have videos of the fully strung fiber optic this weekend, I"m so excited to see how this turns out.



25  Using Arduino / Project Guidance / Re: fiber optic balloons on: May 17, 2012, 05:47:43 am
I got a bunch of 3ft white latex balloons but the 3mm fiber is not lighting it up. The thicker latex might not be transparent enough. I think I'll just try putting a blinky led in it for the moment.
26  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 14, 2012, 10:42:20 am
After putting a bunch of different caps on the 12v rail the system runs fine now.
27  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 14, 2012, 02:09:45 am
Buffer chips all hooked up and working.

I have written code to increment the power by 10, hold when it maxes out, then decrement by 10, choose a different color and repeat for 0-15 and 16-32. 

Here is the video of it http://youtu.be/XE208O-SGA8 I noticed that it is tripping the power supply but only on this particular program. I can turn on all the outputs and get white light out of it without any problems but it seems that when I have it fluctuating a lot it trips the circuit protection.

The power supply is out of my gaming computer,  currently I have the anodes (v2) hooked up to a 12v 20amp rail. I'm thinking a very large capacitor will fix this issue, my other thought would be to move it to the dual 12v line meant for the processor, maybe both.
28  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 10, 2012, 05:40:32 am
Yup, I also plan on buffering the first Sin so it is not out of phase by a clock pulse, but the other Sin's should be fine tied to the Sout's of the other boards.
29  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 10, 2012, 03:30:44 am
I put caps on all the boards and stress tested the system by eventually turning all the outputs on and it does not glitch (extremely bright though). It sure does get toasty hot on my heatsinks but normal operation should be fine. 

It does still glitch when I run a code to increase the power on each delay, hold at peak, then decrease and choose a different color so that gives it a pulsing effect, but instead half the leds turn on, the others glitch so I'm thinking there is still noise on a signal line somewhere.

I just had a quick question about the buffer chips that i'm about to put in. See my wonderful paint skills in the attached pic.
30  Using Arduino / LEDs and Multiplexing / Re: 6x TLC5940 32 rgb leds on: May 04, 2012, 05:28:56 am
Sweet, I've ordered a bunch of those. The regular knight rider code works ok but it still has a shifting problem if I try to power on 32 leds or more. I'm hoping that the buffer chips on the signal lines will help but also wanted to add bigger decoupling capacitors to filter out the lower frequencies that the .1uf caps can't filter out. I've got 10uf, 47uf, and 100uf caps, besides putting them on the power line of the tlc chip is there any other place I want to put them?

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