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Actually, by accident, I found that WS2812B works from 3.3V supply and 3.3V data directly. A) Parallax Propeller + 5V PSU for LEDs. F**k the standards for data. B) Arduino Uno @5V data + 3.3V PSU for LED. Accidentally had 3.3V DC-DC step down converter instead of 5V. Can’t ...