Just some tests and maybe a path towards Fire2015?

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Just some tests and maybe a path towards Fire2015?

#FastLED

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Beautiful! Love the fire! And the dot grid pattern at http://www.youtube.com/watch?v=QmkCvihs0wo&t=1m54s! Using a lens filter for the flare?

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Thanks! The stars are created by a cross gitter filter like that one: https://www.hama.com/00087358/hama-special-effect-filter-8-point-star-58mm

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This really quite amazing! I especially like the grid pattern towards the end! Great work as always! Can’t wait to see the next post!

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wow.
that is sooooooooooooo

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Nice spin on the fire…

I would really appreciate details about the HW that you are using for all these animations.

I see that the matrix is 32X32… are the LEDs WS2812 ? What controller are you using ?

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Wow Stefan, these are some next level patterns! I can’t wait to see what it looks like when you start making the patterns react to audio. If you’re waiting to figure out how to connect your MSGEQ7 to the Teensy 3, there’s another option: use a simple R-C circuit and the Teensy Audio Library: https://github.com/pixelmatix/SmartMatrix/tree/master/examples/SpectrumAnalyzer

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Hi JP, Stefan is using a Teensy 3.1, SmartMatrix Shield, and multiplexed RGB Matrix Panel. These panels are way cheaper than a 32x32 WS2812 panel, though not as bright.

Stefan posted an earlier version of his code here and it mentions the SmartMatrix:

I sell the shields and panels through a Tindie store, or you can buy them through a number of distributors including Adafruit. Full list here:
http://docs.pixelmatix.com/SmartMatrix/shop.html

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Hi @JP_Roy , I use an (overclocked) Teensy 3.1 + https://www.adafruit.com/product/1902 + https://www.adafruit.com/product/1484
The leds are multiplexed and driven by FastLED +@Pixelmatix s SmartMatrix lib with 36 bit color depth.

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Hey @Pixelmatix , thanks. To be honest, for my purpose I don´t see much sense in software FFT. With the MSGEQ7 and a conservative timing it takes me 210 microseconds to get the readings of 7 bands, 140 microseconds are also possible with a reduced accuracy. And for a good effect I need this speed, because it allows to really have the audio information visible in the next frame - with some meters distance to the speakes that means, that you basically “see” the music, BEFORE you hear it, because the sonic-speed is so low. And exactely that makes the difference in the feel of an effect - it kind of “snaps in” and is absolute synchron to the music. No low latency but no latency. And I´m already pretty at the edge of the calculating power of the Teensy while targeting 100 fps+. So I will go for the external chip… soon. :slight_smile:

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Thanks @Stefan_Petrick and mr. Pixelmatic… :wink:

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@Stefan_Petrick Interesting, I have a few MSGEQ7 chips around, I will have to try them.

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A 74HTC245 should work for the levelshifting of the strobe and reset pin, a voltage divider should reduce the output from 5V down to arround 3.3V… (The 3.1 analog inputs are also 5V tolerant, but this would waste resolution.)
But just in theory yet. :wink:

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4k7 + 10k? Or 3k3 + 6k8? What would you take, @Pixelmatix ?

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I’m not that familiar with the MSGEQ7 or using ADC on the Teensy, but why wouldn’t you just power your MSGEQ7 chip from 3.3V and avoid any need to level shift? The MSGEQ7 datasheet says “The chip supply can be between 2.7 and 5.5 volts with 5 volts providing the best performance”, but it doesn’t say what reduced performance looks like.

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Also keep in mind that if the 5V rail going to the MSGEQ7 is shared with the matrix panel it’s not going to be very stable. The panel goes from drawing no current to up to 3.5A and the power supply voltage will drop. The 3.3V coming from the Teensy should be more stable.

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Oh, great, I wasn´t aware that the MSGEQ7 can be operated at 3.3V, too. The data sheet confirms it. Very good. Thanks for the hint - that makes it even more easy than I thought!

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wow this is beautiful i dont even know where to begin to understand how this works where would i start???

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Thanks @Brett_Hansen and maybe it´s a good start to read this short introduction: https://plus.google.com/115124694226931502095/posts/Uup3o2jriFv
Basically I do nothing else than moving content along lines.

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Just for the record: The MSGEQ7 works at 3,3 V but there is much more noise in the signal compared to an operating voltage of 5 V. It can particulary be compensated by post processing of the data but signal quality @ 5V is way better.