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a bout voltatage regulators LM78xx

Discussion in 'Electronic Basics' started by sp, Apr 13, 2008.

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  1. sp

    sp Guest

    I have seen about these possitive voltage regulators in book.
    it will give give constant voltage. can we get the constant voltage
    with out using external capacitors.i saw in one book in that they are
    use very bulky capacitors.In another book they were use in ceramic
    capacitors. Is value of capacitors dependent on o/p voltage of
    regulators.How to select value of filter. How the transient voltage
  2. Jamie

    Jamie Guest

    You don't need a bulky cap if the input source is rather stable..
    You could do well with a small cap to prevent oscillation that appears
    in some makers of those regs."
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