plz Help.....how do i bulid this????

Discussion in 'The Projects Forum' started by lovelystar, Dec 29, 2009.

  1. lovelystar

    Thread Starter New Member

    Dec 29, 2009
    1
    0
    hey!!! i m in my pre-final year doing my engineering in telecom

    we were asked to do a simple mini project over the holidays!! i m so very new to this stuff!!! i don't know how to start!!! plz help me out...

    the circuit is attached.. thanks!!!:):):)
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    Do you want to build a demo, where the parts can be reused, or a permanent type circuit, using something like a solder perfboard?

    You waited a bit long, this is going to take you a little longer than someone experienced.

    What part of the world are you in, this affects parts sources.

    The 555 Projects
     
  3. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    864
    40
    Are you looking to build the exact circuit in the file? Or are you seeking advise on how to modify this circuit?
     
  4. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    The extremely old circuit was used to charge an old Ni-Cad battery in an old cell phone.
    It will cause a modern Lithium battery to catch on fire so don't use it to charge a modern cell phone's battery.

    My wireless home phones still use an old Ni-Cad battery. The old batteries fail frequently.
    A new phone complete with a battery and charger costs less than just a battery.
     
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