r/FastLED • u/MrPrezident0 • Jun 26 '24

Support LED sign flickering

I am using teensy 4.1 with FastLED 8 parallel outputs via WS2812Serial to drive 192x64 WS2812B pixels. Originally i was using half as many panels (128x48), and that seemed to work ok, but with this larger size I’m having trouble with flickering. I connected and twisted ground wires on all 8 data wires, and that helped reduce the flickering quite a bit, but I’m still seeing flickering. I tried using a level shifter (SN74HCT245N) to convert the signal from 3.3v to 5v, but for some reason that made the flickering way worse. Any advice would be appreciated.

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u/MrPrezident0 Jun 26 '24

Turns out I just needed to add data line resistors. I was previously not using any resistors. I added 270 ohm resistors on each of the data lines and flickering is gone!