After always being interested in learning more about electronics, I figured LED-strips would be a great start.
I'd like to power a 4 meter WS2812B-LED-strip (60 LEDs/m). These run on
5V and draw about
60mA per LED. That's
75W. However, I've yet to find any power supplies for these figures, only imported industrial ones – which feels a bit scary with my limited knowledge.
I've understand that powering it through the Arduino is a bad idea, but what's the simplest and cheapest solution for powering it? I do have a bunch of old supplies for laptops and whatnot lying around.