Here you can see that you need some distance between LEDs and acrylic.

Leo_Bettinelli · May 17, 2015, 1:18pm

Hi Thomas & fastled users!

I wanted to ask something regarding the “giladaya” examples. I am trying them out with my florabrella ((FLORA - Wearable electronic platform: Arduino-compatible [v3] : ID 659 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits)) which is bassically a 16 * 8 matrix or an 128 pixels array.

In the examples where the number of leds is defined by #define NUM_LEDS (PS_PIXELS_X * PS_PIXELS_Y), how do I change this values?

I tried to change the values straight forward and I didnt get the results I was expecting. I tried both #define NUM_LEDS (8 * 16) and #define NUM_LEDS (16 * 8), and I see only half of the leds working.

Thanks in advance!

Leo_Bettinelli · May 17, 2015, 1:20pm

And I also tried:

#define PS_PIXELS_X 16
#define PS_PIXELS_Y 8

and then the programm changed completelly! the green fire programm has now also other colors!

but it also uses all the led strip!

Thomas_Runge · May 17, 2015, 5:10pm

Yes, that code is not intended to run on something different then 8x8. There is even an issue on its github repository (although unanswered): https://github.com/giladaya/arduino-particle-sys/issues/5

Thomas_Runge · May 17, 2015, 5:29pm

Regarding your color problem: look at PsConstants.h, here are the defines for PS_PIXELS_X and PS_PIXELS_Y. But also for something called PS_P_RADIUS, which is used in the main rendering function. Don’t ask me, what it exactly means, but I’d increase that as well. As that define has no x- or y-component, I’d guess, that that code is not intended to run on non square displays either. Just increase that value and look, if the animation runs nicer. Keep playing until you are satisfied with the result!

If you run into speed problems, PartMatrix.cpp seems to be the place to replace his HSVtoRGB, fade, add8/sub8 with ours.

Leo_Bettinelli · May 17, 2015, 7:27pm

Great thomas!

thank you very much for all this data.

I am not interested in the patterns as a square display. I think they are very nice for different set up, so with all this info I will be checking this around, enjoying, and learning.

Thanks again!

Leo_Bettinelli · July 20, 2015, 10:06pm

Hi @Thomas_Runge

I need to come back to this conversation because somehow I could never again make your examples work as I did one time in the past.

I have the library downloaded from https://github.com/giladaya/arduino-particle-sys

And I also downloaded your http://coto.homenet.org/fastled_giladaya.tgz

I am using an Arduino Flora on pin 6, with a neopixel led strip, 5Volts

When I open for example “giladaya_Fire.ino” and I only change the pin from 9 to 6, and I upload the code, what I have are the first 3 pixels displaying different shades of oranges and red.

Same result if I also change the chipset to WS2812B

How can I force this sketch to affect the whole led strip, if there is a way?

thanks!

Thomas_Runge · July 21, 2015, 5:36am

You have one LED strip connected? The code is for a LED matrix. That could explain it.

Leo_Bettinelli · July 21, 2015, 10:09am

ok. I understand. I dont know how is the connection of a matrix. Is there a tutorial around?

Also what surprises me the most, is that one day, playing aorund with the code, I got to make it work in the strip for almost all of the pixels. How could I apply this programm into a led strip?

thank you very much thomas!

Thomas_Runge · July 21, 2015, 10:32am

There are some docs about matrices on https://FastLED.io/ and in the history of this g+ group.

Applying matrix patterns to strips might get nice results, but better play with the examples as a starting point.

Leo_Bettinelli · July 21, 2015, 6:08pm

ok. I though that a matrix could be simply a led strip, but treated as a matrix by the software.

which examples do you refer to, as a starting point?

danke thomas

Thomas_Runge · July 21, 2015, 6:41pm

Sure, a matrix could be just a strip layed out in stripes of, say, 8 LEDs. Just watch my contributions to this forum. There is a video which shows an example.

Evan_Bruno · August 16, 2015, 6:08pm

Has anyone been able to successfully port these animations to a 16X16 matrix? i can only get the first 4 rows of my matrix to randomly lite up.

WannaDIY · December 23, 2016, 9:54am

Amazing, super. I got a box full of these super WS2812B leds in strips and rings and al sorts of others, Finaly found the way to use it, thanx to this fastled community. THANXXX
WannaDuino!!!