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Low voltage capacitor circuit

Discussion in 'General Electronics Discussion' started by keys, Aug 14, 2013.

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  1. keys


    Aug 14, 2013
    Hi all,

    I am working on a hobby project involving supercaps for energy storage. What I want is basically a very low voltage buck-boost converter. It seems like a simple problem, but I can only find boost converter schematics or off-the-shelf boards that don't have a very broad input range or output range. In short: I am looking for a low-voltage voltage stabilizer that has input voltage 0~5 V (0 meaning as low as possible, 1 would do) and output voltage preferably variable or fixed at 4.2 V. In effect, the circuit would mimic a fully charged li-ion cell but have the ability to be charged much faster.

    Any help is welcome!

  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    What range of input voltages do you expect? (that is the most important consideration)
  3. keys


    Aug 14, 2013
    Just the 1~5 V from the capacitor. I use a different circuit for charging the capacitor to max. 5 V.
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