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5V Micro USB Power Supply

October 20, 2011

After a great deal of speculation the 5V Micro USB Jack has been confirmed to supply power to the Raspberry Pi board. Eben states this was for two reasons:

  1. "Ubiquity. Micro USB has been chosen as the GSMA’s Universal Charging Solution, so we expect AC adapters with this connector to be cheap and plentiful.
  2. Voltage assurance. Unlike coaxial jacks, we know that we’ll be receiving 5V over this connector, which we can pass on unregulated to HDMI and USB devices.

Model B owners using networking and high-current USB peripherals will require a supply which can source 700mA (many phone chargers meet this requirement). Model A owners with powered USB devices will be able to get away with a much lower current capacity (300mA feels like a reasonable safety margin)."

For those wondering what a 5V micro USB power supply looks like grab the nearest mobile phone and it will most likely utilise the same technology. If your still flummoxed, here's a picture. 

Last update: September 04, 2015

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