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Thread: Crowbar protection
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face BY : Jim email (remove spam text)



14 V eh?

Sounds like automotive mains.

A nasty environ - I lost LM555's when powered
directly off automotive mains YEARS ago - on
one of my first projects!

Solution was to add a real - sorry, an "RF" term
there - add a series resistor along with a shunt
electrolytic cap - any 'spikes' are met by (dropped
across) the R (chosen based on some maths) against
the influence of the electrolytic cap ...

RF Jim



   "Our ability to manufacture fraud has exceeded
    our  ability to detect it."

    - Al Pacino as Viktor Taransky in the movie 'Simone'

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