The power supply required for E50 is 5V/1A, and this number is a value with sufficient margin.
So if you don't have a suitable power supply, you can use the USB port of your PC as a substitute.
The power supply standard of the USB port of the PC is
USB-type A, USB-2.0 ports --- 5V/0.5A
USB-type A, USB-3.0/3.1 port --- 5V/0.9A
USB-type C, USB-3.0/3.1/3.2 ports -- 5V/3A
is stipulated as
I've used the E50 for a while with the USB-A USB-3.0/3.1 port and it worked perfectly.
However, it is difficult to use on a laptop PC.
So if you don't have a suitable power supply, you can use the USB port of your PC as a substitute.
The power supply standard of the USB port of the PC is
USB-type A, USB-2.0 ports --- 5V/0.5A
USB-type A, USB-3.0/3.1 port --- 5V/0.9A
USB-type C, USB-3.0/3.1/3.2 ports -- 5V/3A
is stipulated as
I've used the E50 for a while with the USB-A USB-3.0/3.1 port and it worked perfectly.
However, it is difficult to use on a laptop PC.
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