project in school

Discussion in 'The Projects Forum' started by Kaiser Ed Bayawa, Mar 20, 2015.

  1. Kaiser Ed Bayawa

    Thread Starter Member

    Mar 19, 2015
    60
    6
    I need some of your help to finish my project. I am an electronic and communication engineering.
    We have a project in school. What comes up to my mind is to build a portable usb charger. Unfortunately it won't charge my phone, it only serves as a battery or a supply not a charger.
    Can anyone help me what else to add in my project?

    My materials are: 9 volt battery, 7805 regulator, switch, and usb female.

    any suggestions would help a lot.
    thank you!
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    760
    The problem is the phone is not detecting the cable.
    There are resistors wired to the data pins. For this the phone model is necessary.
     
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  3. DickCappels

    Moderator

    Aug 21, 2008
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    Kaiser Ed Bayawa and absf like this.
  4. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,025
    3,789
    If it is an Android phone, then I have no idea.
    I assume it is an iPhone - specifically, a 5S or 6 with the little lightning cable. If so, there is a little controller chip in the cable end that goes into the phone.

    See this article.
    http://gizmodo.com/5945889/some-third-party-adapters-might-not-work-with-your-new-iphone
     
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