Blinkstick Pixel with Stripe

Hi,

is´s possible to connect a Pixel on a Flex USB Controller?

I´m not sure if I understand …
If you mean a BlinkStick Flex you can order the standalone Flex Board and connect one LED pixel to it.

Yes, i will connect a Pixel on a Flex Board.

Besides the Flex a Nano can be good for you. It is like the Flex but comes with only 2 Pixel.
https://www.blinkstick.com/products/blinkstick-nano

but I want to separate the led with a cable from the board

Then its the Pro or the Flex.

the brightness of LED Flex is not enough and the Pro Board is too large. Therefore, I would run a flex board with LED pixels prefer

Yep, Flex Board as the standalone version should be right for you.
https://www.blinkstick.com/products/blinkstick-flex

The models I have all;)
The question was just whether it works.