Ok so im planning to do control some RGB LEDS with an arduino nano by connecting the LED strip to the arduino then connecting the arduino to a self powered usb hub via usb cable which is connected to my laptop where i will program how the LEDS will light up and stuff.
The thing is i was planning to power up the LEDS with the usb hub but im not sure about the how much voltage the USB hub outputs and how much current can run through it, can anyone help and tell me what i should and should not do?
-LEDS: input voltage of 5V, power of 18watts, which means about a current of 3.6A
-USB Hub: "EASYIDEA USB HUB 3.0 4/7 Ports Portable Micro USB 3.0 HUB Splitter With Power Adapter For PC High Speed 5Gbps USB Splitter HUB" from aliexpress
Also i saw a guy doing the same thing and powering up the LEDS with his laptop usb port via usb cable and i thought that 3.0 gives out 5v but only has a max current of 900mA so i was a bit confused, can anyone explain?