Found a nice circular LED Bar from microbot MR400-013.1 using a NXP PC9635 I2C chip.
Operating power supply voltage range of 2.3 V to 5.5 V
Target is to write a module, more infos in the next couple days
If you like WS2812, Banggood has some nice circulars:
o connected to a 3.3V power supply
o board comes without pullups - choose 4.7K
o found id 0x60 and 0x70
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