atuline
commented
5 years ago Hi Trevor,
Yes, the animation is very slow on a larger amount of LED’s using WS2812’s, which is why a lot of people revert to parallel outputs or use APA102’s, which have a much higher data rate.
In general, parallel output with WS2812’s seems to be the way most people get around that.
As for calculations, here’s something I just dug up:
The datarate should be 400 KHz or 800 KHz (FastLed,h library). Each WS2812B needs 24 bits of data. Thus at 800 KHz/24 bits/LED, you can send 33,333 LEDs worth of data in one second. If you want to update at a 50 Hz rate, then you get 1/50 of that, so 666 LEDs. 100 Levels = 6 LEDs per level. If 400K, then just 3. "The display rotates at 3000 RPM = 50Hz" 3000 rev/minute * 1 minute/60 seconds = 50 revs/sec, or 50 Hz. Ok.
Note that the above is the ‘theoretical’ maximum you could possibly get, not counting the overhead of any ESP8266 processing.
Hope that helps,
Andrew
From: Trevor Steyn notifications@github.com Sent: August 21, 2019 5:55 AM To: atuline/FastLED-Demos FastLED-Demos@noreply.github.com Cc: Subscribed subscribed@noreply.github.com Subject: [atuline/FastLED-Demos] Slow FPS (#30)
Hi Andrew, Firstly great work on these effects. This is more of a question so here it is.
I am using your soundmems code in a project of mine and its working flawlessly on a small strip of leds 40 ws2812s (Code is on a esp8266) I get a steady FPS of 400 with this config, When i increase the LED count to 680 I get a low FPS around 10 or so and the animations dont work as they should, Is this very low FPS expected when running so many LED's?
Regards Trevor
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crashza
Hi Andrew, Firstly great work on these effects. This is more of a question so here it is.
I am using your soundmems code in a project of mine and its working flawlessly on a small strip of leds 40 ws2812s (Code is on a esp8266) I get a steady FPS of 400 with this config, When i increase the LED count to 680 I get a low FPS around 10 or so and the animations dont work as they should, Is this very low FPS expected when running so many LED's?
Regards Trevor