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
    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
    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.
    Kaiser Ed Bayawa likes this.
  3. DickCappels


    Aug 21, 2008
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  4. GopherT

    AAC Fanatic!

    Nov 23, 2012
    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.
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