esp32 and ws2812b blinking crazy

[83icaro]

Hi
I'm new in this formu, First of all I greet you all.

I've a problem with strip led ws2812b connected to esp32. I wrote a small program to switch on and switch off all led sequentially.
To obtain 5v for ws2812b and 3.3v for esp32 I use arduino uno module connected with my laptop (usb). When I use this configuration all work perfectly.

I bought a 5v power supply LEADSTAR 5V 10A 50W and when I connect ws2812b with this (and esp32 with 3.3v of arduino) the led start blinking, with random duration and color.

Have you any idea? Arduino Uno provides 4.68V in output, instead the LEADSTAR provides 4.86v (it provides from 4.86v to 5.32v with regulator, i've regulated at minimal voltage)

[ESP_Sprite]

Are your grounds all connected? If not, can you draw out how you have connected everything?