keep the load on in the capacitor charge discharge circuit

Discussion in 'General Electronics Chat' started by d_c_robo, Dec 12, 2014.

  1. d_c_robo

    Thread Starter New Member

    Dec 12, 2014
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    hello friends

    i am new on this forum and would like to ask a question on one of my projects.

    1. i have a continuous power source which gives me a voltage of about 6 V and some mA current good enough to light a bunch of LED's which can give light and charge mobile batteries.
    2. since I have a continuous power source i have to also use this power to be stored in a capacitor and discharge continuously for charging and discharging mobile batteries.
    3. can anyone give me an idea how to built a circuit for this example.
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    What is the source of the continuous power?

    Where is the charging regulator? Inside the phone, or are you attempting to build one external to the phone?
     
  3. d_c_robo

    Thread Starter New Member

    Dec 12, 2014
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    0
    hi

    source of continuous power is a normal rectifier circuit which gives dc output of 6 v

    i need to build a charging discharging circuit based on a timer so that i can plug on and plug off the battery for charging it..
     
  4. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    You didn't answer my question. Are you trying to build a charger that charges cell phone batteries where the battery is removed from the cell phone? If so, this is a very complicated project, much beyond the capabilities of a beginner.

    If you are trying to supply DC to the cell phone, where the cell phone battery is inside the cell phone, then this is a more doable project...
     
  5. d_c_robo

    Thread Starter New Member

    Dec 12, 2014
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    0

    i have to charge a battery and also store the energy in the capacitor or a battery which i can later use.
     
  6. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    Storing energy in a capacitor for later use is not practical because the voltage drops linearly as the charge is used. You need a secondary battery, such as a 6V Sealed Lead Acid rechargeable battery:

    [​IMG]
    Such a battery has a very flat voltage vs discharge curve. In other words, the voltage is almost constant as the battery discharges...


    Now you need an AC-line powered "charger" for the 6V SLA. It is much easier to build a charger for a SLA battery compared to other battery chemistries...
     
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