If I used a wall outlet as a power source, how many volts is that? What about USB?


kelseymh8 years ago
What country are you in? In the U.S., wall voltage is 117 VAC (rms), at 60 Hz. In Europe and Japan, it's 220 VAC at 50 Hz. USB output is 5 VDC, with a maximum current of a few hundred mA. If you don't know what you're trying to power, choosing the wrong option will do a lot of damage.
> choosing the wrong option will do a lot of damage. . bzzzzZZT POW! Been there, done that, hope to avoid it in the future.