Nedded help to run my Raspberry Pi from Battery

Discussion in 'General Electronics Chat' started by Sharfuddin Shawon, Nov 5, 2013.

  1. Sharfuddin Shawon

    Thread Starter New Member

    Nov 5, 2013
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    I want to run my Raspberry Pi from batteries. I am wishing to use a 9v battery.
    But due to lack of Electrical Knowledge I am not sure how to get 5v regulated voltage with 2amp current...

    Sorry for Bad English.
    Thanks in advance,
    Shawon.
     
  2. Ramussons

    Active Member

    May 3, 2013
    557
    92
    9 Volt batteries, normally available are type PP9, and will not be able to give 2 amps.

    I would suggest using a 6 or 12 V rechargeable battery with a 5 Volt SMPS.

    Ramesh
     
  3. crutschow

    Expert

    Mar 14, 2008
    12,981
    3,221
    Do you need a full 2A for the Raspberry Pi? Generally you can use a IC regulator such this but it would dissipate (9V-5V) * 2A = 8W at 2A output so would need to be on an adequate heat sink.
     
    Sharfuddin Shawon likes this.
  4. Sharfuddin Shawon

    Thread Starter New Member

    Nov 5, 2013
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    Ok, what if i want to use a 6v, 4.5Ah battery?
    I meant, which IC/regulator should i use and what kinds of schemetic should i follow?

    And what does 'SMPS' mean?
     
  5. Sharfuddin Shawon

    Thread Starter New Member

    Nov 5, 2013
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    0
    Actually i would not need exact 2A always; but somtimes I may need. Thats why i am planning to build one with atleast 2amp output.
    And i think, 2A will not harm my RPi, if i use so instead of 750mAh? ;)

    BTW, Thanks.
     
  6. Ramussons

    Active Member

    May 3, 2013
    557
    92
    Switched Mode Power Supply.

    Normally, the Maximum Rate for Charging / Discharging is at 1/10 of the AH value - for a 4.5 AH battery it would be 450 mA.

    Ramesh
     
  7. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
  8. PackratKing

    Well-Known Member

    Jul 13, 2008
    850
    215
    Hey, Sarge ! Long time no see !!!
     
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