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Power is the rate at which energy is supplied or consumed, often measured in Watts. This tag covers electrical power specifically, the voltage and current specifications for supplying power to the Pi, the specifics of power consumption by the Pi, and methods for controlling Pi power consumption.

7 votes

Can I use Raspberry Pi as a USB peripheral device?

Rasberry PI A/A+/B/B+ models have OTG mode disabled by variety of reasons: USB port occupied with USB hub (ethernet), missing OTG 5th pin (grounded), or data pins are not connected (power port). … Data USB port can be used for OTG and “power”. As of time of this writing Serial and Ethernet were tested, but others should work with proper amount of efforts (keyboard, disk, camera, etc.) …
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