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

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kelseymhBest Answer (author)2009-05-02

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.

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NachoMahma (author)kelseymh2009-05-03

> choosing the wrong option will do a lot of damage. . bzzzzZZT POW! Been there, done that, hope to avoid it in the future.

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