How much power can you draw from the Raspberrypi pico w?
April 5, 2023, 11:59
surprisingly i didn't find anything about this: i have a device that needs 5v 480mAh, can i connect that to VBUS or do i have to install a completely separate micro usb port just for that?
Better to not stress the pico
VBUS is the micro USB 5v rail. See https://datasheets.raspberrypi.com/picow/pico-w-datasheet.pdf appendix A.
As for the USB standard say that you can draw a max of 500mA from a USB bridge (minus other devices connected to the same USB bridge). And then you have to subtract the power consumption of the Raspberry Pi Pico.
So the easy answer is No and the correct answer is "It depends on what is delivering the 5v USB, is it a PSU, port on your PC or....".
USB bridge = USB Hub or USB connector on a PC can deliver 500mA max
The standard say, 500 mA from a USB 2.0port and (900 mA from a USB 3.0 port
But now there is an PD (Power Delivery) extension to the USB standard that can deliver more amps. And you also have QC (Quick Charge).
So it depends on what standard the USB port supports in the device (PC, Hub, Power bank ....)
You should never run a lot of current trough any PCB.
I mean it's just ground
Yes and both + and - must have an equal dimension