What does it mean by a 2 inch toroid? two inches internal or external
diameter?

ALso, whats the purpose of the 2 diodes in series, and why are they
called 'switching'. Thanks.

On Wed, 26 Sep 2001 17:26:53 +1200, you wrote:

>    Self flashing LED
>    Place it in bright light and the LED flashes.
>    Self powered
>
>               ftp://ftp.eskimo.com/u/m/mzenier/kmcmled.gif

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