It depends on how complicated you want to go. Cheap is just a capacitor to
smooth out peaks and valleys. But without know more about the quality of
the power coming from the generator it is going to be hard to
assist. Electric motors are often poor generators as they are tuned for
wrong. Adjusting the timing advance of the brushes can help. Then comes
the issue of how much current is being produced vs you needs. Because it a
few diodes and caps can double your voltage if you are willing to sacrifice
the amperage. What PIC are you using that is happy with 1.5 V?

At 05:04 PM 1/15/2003, you wrote:
>I am using a small dc motor to generate electricity. I want to keep the
>electricity up to 1.5-3.0 V. I need a circuits using cheap components
>like cap to keep.
>
>Any best ideas  and samples sites have this circuits. Pls do not ask me
>to use Battery or rechargeable battery.
>
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