How to connect device with 5V power to PC via USB without power conflict?
72043
Automatic switching between external 5V and USB bus power supplies
87294
Power off an USB device in software on Windows
67468
How do I create a "hybrid" USB stick?
12892
How does a USB C port provide the power to charge laptops?
67534
What is / how can I get a student-safe power supply for electronics projects?
89981
Can I safely connect the power-only-end of a USB-Y cable to an other power source?
56268
External power to STM32F4 Discovery board
32346
How to get 20 V from a USB-C charger?
37100
Using a higher current charger on a laptop which requires a lower current
67432
Can connecting of AC adaptor first into device, then into mains pose a risk of voltage spike?
88469
Can I disable charging peripherals via USB?
80449
DIY 24v to 5v usb phone charger
114865
Is there really no way to power a DSLR by USB?
68228
18V from printer USB port. Is that normal?
135012
How to disable a USB port in Windows (XP) and make it available only for charging?
153381
How do I design a 2A or more power supply for my consumer USB devices?
152407
Does a self-powered USB device have to connect to VCC from the host port?