Hi there,
I have one question about wiring in 3-wire PWM WS2812B from wiki. There is that some people put a resistor 100 Ohm between LED data and Pi GPIO 18. I tried both cases with and without resistor but I don't see any difference.
1.)Could you please explain me the purpose of resistor in this wiring diagram?
2.) If I don't see any difference with and without it, is it better to use resistor or not?
3.) What does it mean "less ringing" in the wiki?
Many thanks for your patience with my newbie questions