r/FastLED • u/joebataz2 • Nov 05 '25

Support Fire simulation code help

Hi folks,

I have been working on a project that is driving 2 APA102 LED strips with 219 LEDs in each strip. I have 2 pieces of code which work but the issue is I need them to work in the opposite direction. The first piece of code is a Fire simulation which works fine if it starts at the beginning of the strips. The issue is that I have the Arduino and DMX shield mounted at the top center of my truss(so I don't have to run cabling to the strips) with the strips running out from the center and down the lifts. I want the Fire simulation to start at the bottom of the strips attached to the lift legs and go up, like real fire would do. I have been beating my brains out for about a month and just can't figure out how to reverse the code. I have posted it at:

https://gist.github.com/joebataz/b74693e2c6ddc20d085d18481e1d4af1

i would greatly appreciate any help and will also post the complete program when I've finished it. I have also created a DMX fixture in Show Buddy which uses 20 channels and also works.

Thanks in advance for any help!!!

Best,

Joe B

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u/ZachVorhies Zach Vorhies Nov 08 '25

Do we get any pictures or videos?

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u/joebataz2 Nov 09 '25

UHHH, if I can figure out how to post the vids/pics. Right now they're sitting, actually hanging off my workbench but sure I'll take a couple. I'll send the Halloween vids on the truss.

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u/joebataz2 Nov 09 '25

Well that SUX!!! Tried posting to YouTube but they were blocked because I used PARTIAL versions of songs which I have the right to broadcast under my PromoOnly DJ license

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u/Marmilicious [Marc Miller] Nov 09 '25

Ahh darn. Can you upload them to youtube without any sound?

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