This says similar to apa102-c, but what are the specs? is it as fast? i'm looking for the features of apa102-c for an ambilight setup

It is not fast as apa102c , this product is clone。 APA102 C is more expensive than sk9822 . If you need sk9822 , we can sell it to you from China . Please contact us support@btf-lighting.com

can you power these with a battery pack or something to recharge - so you can put it on something, like PVC plastic pipe, wrap around tightly with adh

These things suck up a lot of power when lit for a battery. You could probably run them on a 3000 mAh battery for about 45 minutes for a string of 60. As for wrapping them around PVC pipe, you could provided the pipe's diameter is an inch or more. If you get the ones with the adhesive tape on the back, that should be fine. That being said, the spacing of the LEDs may be weird.

Is there any arduino or esp32 samples that will control this sk9822 strip ?

We don't sell these controllers, so there's no kind of sample. You can look for related teaching videos on YouTube, where there are many such teaching videos for you to learn.

BTF-LIGHTING SK9822(Similar to APA102C) Individually Addressable 16.5ft 5m 60 Pixels/LEDs/m 300LEDs Non-Waterproof Black PCB Data and Clock Separately DC5V Full Color

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