title: Power on a Raspberry Pi with Arduino
body: <p>I am working on a project which involves to power <strong>on/off</strong> a Raspberry Pi with an Arduino. In fact the project contains several sensors like a motion sensor and the Arduino will be supplied with a 10kmA battery.</p>
  <p>The motion sensor is connected on the Arduino device.</p>
  <p>Once the sensor detects a movement, the Arduino will receive the instruction to deliver the 5V to the Raspberry Pi.</p>
  <p>How can I supply the Raspberry Pi with the Arduino? GPIO? USB?</p>
  <p>I have already seen solutions to power an Arduino with a Raspberry Pi, but never the opposite.</p>