> Looking at transorbs and zeners (with a series fuse or polyswitch) gives
> me the impression that they will not save the logic chips being
> toasted.  Any ideas?

make your own (faster and more accurate) zener from a TL431 and a=20
transistor?

(Hurrah, a topic that has something to do with electronics!!!)

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Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

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