There is a thing that I cannot understand about voltage supply from 52 DK ( about WS2812B )

[BLEPRODUCT]

Hi, nordic.

I've been developing a product with ws2812B.

As I know, ws2812B is needed around 5V to work well.

And I measured voltages on 52 DK board.

VDD pin has around 3V and 5V pin has around 5V.

When I connected ws2812B with VDD pin, it worked really well.

But, when I connected ws2812B with 5V pin, it didn't work.

( I connected USB on 52 DK as well on these situations )

I have been searching a lot of information about this on Infocenter, Devzone and Google.

But I couldn't get anything.

For figuring out what is problems, I need your help.

I want to know what exact voltage do they supply and how many current do they supply on 52 DK board.( VDD and 5V )

And do you have any idea of this situation?

Thank you.

[Simonr]

Hi

I just did some quick tests on a DK here on my end, and here's what I measured the two pins to output in regards of voltage:

5V: 5.2V 

VDD: 2.94V 

As for the current, the pins will draw whatever is required, as long as the USB port is able to supply it. While supplying an external chip from the 5V pin (using a USB cable), I experienced a power surge from the USB a few times when the current consumption got too high for the USB to supply, so I'm guessing that is your bottleneck as well. In any case, I recommend you use the VDD pin, as the 5V pin is generally reserved for when the DK is used as a shield for an Arduino.

Best regards,

Simon

[BLEPRODUCT]

Thank you for quick test and reply.