Weird issue using WS2812B with external power supply - LEDs and Multiplexing - Arduino Forum

I'm trying to turn on leds using esp32 powered using an external 5v power supply. The issue I'm facing is that I can only (well, mostly only. more on that later) turn the leds without the power supply, connecting everything from the esp (3.3v,GND,Data). when the power supply is connected, either with powering the esp via VIN, or only connecting the GNDs and powering it via usb, the leds won't turn on. Had it stopped here I would've assumed my circuit is simply wrong. Yet and that's where thing

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GitHub 452/arduino-ws2812-direct-spi-control: Simple, 51% OFF