I am looking to see if there is a way to power a monitor like this: (https://www.amazon.com/gp/product/B07774L6TT/ref=ask_ql_qh_dp_hza) over one (or two) of the PC's USB ports, so theoretically it would be a two wire setup, 1 HDMI, 1 USB for the whole display, no need for an extra wall outlet. I have seen USB 5 V to 12 V step-up cables but they seem to only deliver 2 amps which it looks like this monitor may need 2.5 amps.


closed as off-topic by Dave Tweed Feb 6 at 21:22

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions on the use of electronic devices are off-topic as this site is intended specifically for questions on electronics design." – Dave Tweed
If this question can be reworded to fit the rules in the help center, please edit the question.

  • 7
    \$\begingroup\$ Without complicated USB Power Delivery circuitry, USB can provide a maximum of 5V×500mA = 2.5 W of power. Your monitor requires 12V×2.5A = 30 W. I trust you see the problem there. \$\endgroup\$ – Hearth Feb 6 at 20:02
  • 1
    \$\begingroup\$ @ChrisStratton As I understand it, some pre-ATX computer power supplies had a passthrough to provide power to the monitor as well. Not to mention that laptops power the monitor from the internal battery as well. So it's not unheard of for the power to a monitor to pass through the computer first. \$\endgroup\$ – Hearth Feb 6 at 20:16
  • 2
    \$\begingroup\$ A very new subset of USB-C can deliver such power. There actually exist monitors that combine both power and video delivery into a single USB-C cable. \$\endgroup\$ – vini_i Feb 6 at 20:23
  • 1
    \$\begingroup\$ @EugeneSh. The purpose of the power delivery standard is to be able to power such things as printers, scanners, and other peripherals such as monitors. This implies that they eventually will be able to do this. \$\endgroup\$ – vini_i Feb 6 at 21:36
  • 1
    \$\begingroup\$ @vini_i I think EugeneSh. 's point is that just because a standard permits something doesn't necessarily mean that every USB port or even every computer will actually support that feature. \$\endgroup\$ – Elliot Alderson Feb 6 at 22:23