General > General Technical Chat
Measuring max output current of a USB port.
balnazzar:
I need to know how much current the usb ports on my computer can output.
How can I put a high load upon them and then measure the current? :bullshit:
tunk:
Maybe something like these:
https://www.ebay.com/itm/294572711871
https://www.ebay.com/itm/394010597121
Wouldn't know, but you may risk damaging the port.
pcprogrammer:
Do you know the motherboard used in your computer. It might be able to find the specifications for it.
alm:
What is the host? The max power modern USB-C ports on a computer or charger will deliver depends on what the device negotiates with the host. Look up USB power delivery. There were also older standards for up to 5V/3A or so. Just connecting a DMM across the USB port, or something similar, won't get you the maximum current or power.
I imagine there are devices to test USB power delivery, but I doubt they sell for $10.
wraper:
--- Quote from: balnazzar on October 21, 2022, 12:28:41 pm ---How can I put a high load upon them and then measure the current? :bullshit:
--- End quote ---
No, if there is a proper overcurrent protection, it will turn VBUS off. If there isn't, something likely will fail.
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