Extract power from iphone

Discussion in 'The Projects Forum' started by JJoll, Mar 1, 2014.

  1. JJoll

    Thread Starter Member

    May 7, 2013
    Hello everyone,
    I was just wondering if it possible to extract power from iphone's battery (through its audiojack, or lightning connector/dock connector) ?
    I am working on a project in which a sound analyzer is integrated with an iphone, and I was wondering if I can power up the sound analyzer (without any external battery) through th iphone.
    if yes, how can I do that? I haven't been able to find anything online yet.
  2. paulktreg

    Distinguished Member

    Jun 2, 2008
    Looking at the pin-out of the iphone connector here it looks like all the voltages are inputs. Reading the notes for pin 27 it does however hint at pin 18 being +3V3 out. You'd need to check this first and ensure it's capable of supplying the current you need.

    Hope that helps?