Charging circuit

Discussion in 'The Projects Forum' started by SWB95, Aug 26, 2015.

  1. SWB95

    Thread Starter New Member

    Jul 21, 2015
    4
    0
    Can anyone point me in the right direction?

    I want to set up a charging circuit for a 9 volt battery which will charge once the battery level is 5v and stop when it reaches around 9.

    I want to run the charging circuit off an alternator which will only come on when the battery needs charging and once the battery is fully charged the alternator will switch off.

    The battery is running a small circuit which can function from 5 - 12v. Hence only charging once it drops to 5v

    Is this possible? and does anyone have any examples or circuits.

    Thanks
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    What is the 9V battery type.
    Nicd or Nimh ?
     
  3. SWB95

    Thread Starter New Member

    Jul 21, 2015
    4
    0
    Sorry, Currently I am using a 9V Ni-MH battery, but honestly, if need be that can be changed.
     
  4. #12

    Expert

    Nov 30, 2010
    16,252
    6,749
    Last edited: Aug 26, 2015
    ErnieM likes this.
  5. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
    1,605
    To beat#12's reply you will kill your battery doing that, no matter what the battery is supplying.

    Are you intending to build your own charger (not recommended) or adapt something off the shelf?
     
    #12 likes this.
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