I bought a cheap strip of what I assume are WS 2811 LED’s. It has a 12v lead, red, green and blue as well (4 wires total).
Is it possible to individually address just one LED so only that one comes on? Also if I cut the strip on the cut lines- how does the arduino know how to address the led’s individually now that there are less led’s on that strip? So for example I start with a strip of 20 and I cut it on the cut line and now there are 12- will what used to be led #13 just not illuminate if I try to address it?
Also- any recommendations on how to safely connect power to the strip via external power supply and still use the arduino to control it? I’ve messed with the 12 led neopixel ring and have that figured out but I’m powering it with the arduino (uno) so it’s a bit different.
Thanks for any help you can offer!