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Micah Elizabeth Scott
@scanlime
i'm saying that the request is basically design a creative software package, and creative software needs to be either pretty general (which takes a lot of work or a skilled user) or pretty opinionated (which requires knowing what direction to code in)
it's a big ask, the 'idea' for writing a program like this is very vague compared to the specific design that will be necessary to decide what to code
George Ioakimedes
@GeorgeIoak
OK, I hear you. I saw the Glediator software and that looked like it could probably handle anything that I could think of would be requested. It just appeared to be a dead project and was a bit surprised that the open source community hadn't done something similar. I sent you a PM of what the first project would be so take a look at that. I just didn't want that floating out in space since you might be able to recognize where it would end up
Micah Elizabeth Scott
@scanlime
if you want a smaller scope than designing an entirely new piece of creative software, you could make something compatible with existing software. some people use video files for this, or DMX512/Artnet
George Ioakimedes
@GeorgeIoak
I wanted this to first be something that could be standalone and not require software to be running on a PC/MAC. Since fadecandy works off of a RPi that seems to be a good choice that should have enough processing power to run the show. I didn't see a way to "import" a picture into fadecandy, add effects, and have that displayed on the matrix. Am I right about that and this is where the extra software would come into play? Creating a video seems like a logical way to run something like this. Just create your show and play the video file in an endless loop and whatever is playing the video is actually outputting to the fadecandy instead of a display
David Sandler
@dsandlerm_twitter
Question:
If I want to develop a matrix that doesn’t add up to 64 leds per strip (it uses half), can I map out double the amount of led strips with half the leds on a single fadecandy? (16 strips of 32 leds)
Stephen Marsh
@stephenhmarsh
@dsandlerm_twitter -- yes but it might complicate the way you're thinking about this matrix in terms of lines/strips if done on a single fadecandy. you could add a 2nd fadecandy and map each data out of the two fadecandies to exactly one of the 16 strips. if you stick with just one fadecandy, you'd had to get 2 strips/lines of the matrix per one data out. this might make spatially mapping the pixels in your code a bit of a headache but could be done by linking two LED strips/rows at a time via the data wire.
i suggest reading the documentation for the fcserver.json file and look at how the fcserver.json file is configured in some of the examples.... that's kind of the lower-level map of the contiguous pixels and their indices.
Stephen Marsh
@stephenhmarsh
if you're using Processing, for example, and the OPC library, you can set the strips/pixels in your code layer to be independent "lines" and non-contiguous, even though the actual hardware thinks they're one long strip
David Sandler
@dsandlerm_twitter
Thank you! Very helpful!
Do you know if it’s possible to run 12 fadecandys on a single raspberry pi?
Stephen Marsh
@stephenhmarsh
@dsandlerm_twitter - i'm not sure the limits of your r pi but the fadecandy documentation explains what will limit you in general: https://github.com/scanlime/fadecandy#what-are-the-limits-how-big-can-fadecandy-go --- in micah's ardent mobile cloud project i believe they used 5 fadecandies off of one pi and a usb hub
David Sandler
@dsandlerm_twitter
Thanks again!
Stephen Marsh
@stephenhmarsh
@dsandlerm_twitter -- welcome, glad to help. btw my understanding is that the power requirements of lots and lots of pixels starts to get a lil scary: https://learn.adafruit.com/1500-neopixel-led-curtain-with-raspberry-pi-fadecandy
David Sandler
@dsandlerm_twitter
Does the SK6812 addressable led strip work with FadeCandy?
I had wondered out loud in the live channel why there was not a 3v3 led module out in the wild
turns out there is (at least now)
Micah Elizabeth Scott
@scanlime
that’s a 5V chip
the 3.2v is Vf for two of the led chips. data sheet still lists 5V as the supply voltage
i’d be surprised to see 3.3v RGB leds, the Vf is just too close to the supply to leave room for a constant current controller, you probably have close to zero headroom with worst case Vcc and Vf
David Sandler
@dsandlerm_twitter
Did anybody get an answer regarding working fadecandy with Ubuntu?
Josephmanuel1989
@Josephmanuel1989
With ubuntu (18) dont worked, i installed version 16 and worked without problem.
David Sandler
@dsandlerm_twitter
Awesome! Thanks for the tip
David Sandler
@dsandlerm_twitter
Hello!
Im developing an image that divides into 22 strips of 22 leds.
The fadecandy server lights up the whole thing, but for some reason when I connect to the OPC it doesn’t.
I copied the same file from the server but it won’t display the whole image
Josephmanuel1989
@Josephmanuel1989
What is the sample that you are openning in OPC?
with this example, all LEDs are off?
Can you post the configuration of server?
chris1seto
@chris1seto
Just curious, has anyone used OpenOCD to program the K20 recently?
I'm normally an STM32 developer, so I'm still getting used to the K20, but it looks like there may be some issue with OpenOCD when the flash is read locked. I see mentions of a patch in the openocd config file, but everything appears to be completely out of date at this point.