I am an absolute beginner in both electronics and LEDs.
I would like to power my WS2812B LED strip (5m, 300 LEDs) with an old PC power supply.
The power supply has 600W so more than enough power.
To trick the power supply into thinking it is connected to a mother board, I cutt the green wire from the 20 pin connector and connected it with a black wire.
After that I cut a red and a black wire and measured the voltage using a multimeter.
I got 5V so everything works as expected.
But if I connect it to the LED strip nothing happens. I expected some kind of reaction from the LEDs.
What I am missing here?