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Aircoookie / WLED

Control WS2812B and many more types of digital RGB LEDs with an ESP8266 or ESP32 over WiFi!
https://kno.wled.ge
MIT License
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Stepiness brightness fading, is it possible to smooth it? #840

Closed StefanRu1 closed 4 years ago

StefanRu1 commented 4 years ago

Hi,

i have a question, to find out if this is normal behavior or not. When i switch on the LED stripe from brightness 0 to 255 with a transition time of 30 seconds or longer the brightness fading seems to be done in steps. So it is not a smooth fading, there is a bit of flickering or stepiness going on. The same is true when going from 255 to 0 over 30 seconds or longer.

The effect always occur when the fading time is long enough, in my case 30 seconds. I tried to film it, but it is hard since the camera is smoothening the flickering out.

This is not a real issue, but kind of a behaviour which could look better.

Is this the expected behaviour? Is there something i can do against it?

Thanks a lot, Stefan

My setup: 3 Lights with Wled 0.9.1 1x 146 LEDS WS2812B IC 60LED/M and 8 A (Floorlight) 1x 77 LEDS WS2812B IC 60LED/M and 8 A (Kitchenlight) 1x 96 LEDS WS2812B IC 60LED/M and 3 A (Stimmungslicht)

All 3 show the same symptom.

Aircoookie commented 4 years ago

Hi Stefan, unfortunately this behavior is standard on most addressable LEDs (and probably all addressed by WLED). There are only 256 possible brightness values per channel, and with slow transitions (> 5 secs) this becomes very noticeable, especially on lower brightness values. There is a technology called dithering which could make the "steppiness" better but costs performance and could cause more flicker (it basically rapidly switches between two adjacent brightness values), so I'm not planning on adding it for now.

The only thing you could really do about it is use a quicker transition, at least for about brightness 0-64...

StefanRu1 commented 4 years ago

Ok, perfect. I just wanted to rule out that it is a electric problem and i could smooth it somehow. It is not a problem and just a minor cosmetic issue. Thanks for the explanation.

Have a nice easter holiday and thanks again for the great software.

Best regards, Stefan

Aircoookie commented 4 years ago

Have a nice Easter holiday too :)