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Capacitor Filtering on a battery supply

Discussion in 'Power Electronics' started by drigg, Mar 24, 2013.

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  1. drigg


    Mar 24, 2013
    I want to use a 12v NiCad battery pack to charger my mobile phone when I am in the bush for emergencies. I will be dropping the volts down with a 5 volt regulator.
    My question is do I need to use a filtering electrolytic cap on the input and or output of the regulator?
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    It would not hurt. However it would benefit you greatly to look at switchmode regulators. You will be able to get more than twice the energy from your battery into the mobile phone.
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