>> Just remember that "12V" in a car is nothing of the sort!  13.2V is the
>> "norm" while running, but ...

> 13.2 volts can become 18 volts, true.  Can also become 24+ volts when some 
> idiot jumps with two batteries, -13.2 volts when some idiot hooks up the 
> jumping battery reversed, or 60 volts when an inductive load dumps it's 
> cookies.
>

LM293x family (and SOME other regulator families) are specifically designed 
to survive all those things. LM7805 isn't.


        RM

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