required resistor ws2813

[SolaRax]

ok
 so I originally bought some cheap WS2812B  strips and I have the appropriate 470 ohm  resistors  for use on the data line
 (  Nano biscotti 4.0 )
 I tried everything to get the strips to work from changing timings to not using the resistors to changing resistor values
 nothing worked so I ordered from a different company
WS2813  strips
 without even putting a resistor on the data line it fired right up   

 this leads me to the question
 is  A resistor required for a WS2813 strip?  is it inherent in the strip itself  to protect the data line ?

 i'm also getting pretty antsy about waiting for a crystal focus 9.0
 should I just get a prism 5.1 ( for this particular saber I could use the same nano biscotti board but I really want that auxiliary button for Accu bolt and I want to try out the  RICE stuff

[erv]

did you wire your first strips the right way (arrow) ?

The resistor is really needed even if it could work without (if the data wire is super short for instance)

[jbkuma]

The purpose of the resistor is to limit current to the data pin.  It can function without it, but it is there for a reason and should be included.  There are scenarios which can kill your strip if it is not included.

[SolaRax]

such as?
 I could only think of one and I don't think it happens from Ervs boards

[erv]

The purpose of the resistor is not to limit the current even though based on Ohm's law you will have a current limit action.
But a side of this the current is naturally limited on my board data pin anyhow.

[profezzorn]

The purpose of the resistor is not to limit the current even though based on Ohm's law you will have a current limit action.
But a side of this the current is naturally limited on my board data pin anyhow.

So what is the purpose then?