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Electric power is the rate at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt (one joule per second). Use this tag where power is a primary concern for the design under discussion. Use the "low-power" tag when that applies.
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If a USB Cable is being used between two devices, are the power wires needed?
I am trying to figure out a way to give power to an android tablet and a DSLR camera at the same time (for a photo booth). … Instead, I want the power wires going from the tablet to go to AC power via a mobile device wall wart charger.
will this ruin any data transfer? …