title: How To Get Electric Power From Head Phone Jack?
body: <p>My quest is if anyone knows how to create an Android app that can send electric charge through the device's headphone jack, like in this video <a href="http://www.youtube.com/watch?v=w0VopnVZQ-w&amp;feature=player_embedded" rel="noreferrer">iPocket_LED</a>. The video shows an app for iPhone that controls a LED plugged into the headphone jack.</p>
  
  <p>I want to know how to access the device to send an electric signal.</p>
  
  <p>Sorry about my English, is not my language, I hope some one understand me</p>