Hello,
I've never played with WS2812B, so i've a question.
I've seen some reseller that sells that chip solder on a pcb, to provide some dissipation, so, does this chip became hot? Can it be wired "on-fly", or does it need some sort of pcb heatsink?
thanks!
It would normally quote this in the data sheet but all the ones I have seen do not.
Yes it will get hot because all LEDs and chips do. The maximum junction temperature seems to be very low and the input current quoted is totally unrealistic, so it is not much help.
Can it be wired "on-fly",
I don't know what you mean by that. You should never wire anything up while the power is applied.
Given the uses you find it in I would not expect it to need additional heatsinking.
Thank you for reply.
I do not read anything about it in the datasheet i've found, that's the reason why i'm asking it here 
Can it be wired "on-fly",
I mean without mounting it on a pcb, simply soldering the chip.
For an experiment, I would like to mount the chip straigh on a plastic box, gluing it, but i suppose it is better to solder it on a pcb and then fix the pcb on the plastic box.
hozone:
I mean without mounting it on a pcb, simply soldering the chip.
For an experiment, I would like to mount the chip straigh on a plastic box, gluing it, but i suppose it is better to solder it on a pcb and then fix the pcb on the plastic box.
It's much easier to get a LED strip and cut LEDs off the end (with scissors). Easier to glue, much easier to solder (I've done it).
Thanks for suggestion!
I mean without mounting it on a pcb, simply soldering the chip
You can but you will need thin insulated wire and the connections will have a tendency peel off under the mechanical strain. Gluing then soldering is not a good idea as the soldering will melt the plastic.
The best bet is to solder it onto very small squares of strip board and wire them up, before gluing them onto what you want.
Grumpy_Mike:
The best bet is to solder it onto very small squares of strip board and wire them up, before gluing them onto what you want.
That's basically what LED strips are.
LED strips also have decoupling capacitors, etc., built-in. It doesn't get much easier....
The best bet is to solder it onto very small squares of strip board and wire them up, before gluing them onto what you want.
Thank you!