I currently have a pi zero w, arduino nano, usb capture setup. All is powered through one power supply that is connected to a smart outlet which I have turning off when I shut the tv off, except the usb capture device which powers with the sub on the tv to view without ambilight.
However; when the power supply is off the power from the usb capture device is still slightly powering the LEDs producing a faint red glow. Kinda cool like a power status, but I’m not a fan.
Any ideas on how to fully cut power other than unplugging the usb capture?