> 15V      .------.
> -----o---| 7812 |---o----> 12V
>          '--.---'   |
>               |      _|_
>               |      --- 470 uF
>             |       |
>            _|_     _|_
>
>
> This is the diagram I am using, the current draw out is 450 m-600 mA
> only.
> Any circuit improvement required to prevent output voltage oscillation ?

My immediate thought is to raise the input voltage. Most voltage
regulators need an input voltage *AT LEAST* 3 volts higher than the
voltage they regulate, so depending upon the regulator, you may be running
in a marginal condition. Check the datasheet on the regulator you're
using (unless it's a low voltage dropout like the 2940 series).

I'd also put a cap on the input, too, and I'd increase the size of your
470uf to something around 2200uf (or higher).

-->Neil

-------------------------------------------------------------------------------
Neil Bradley            In the land of the blind, the one eyed man is not
Synthcom Systems, Inc.  king - he's a prisoner.
ICQ #29402898

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