Well, there are two type of engineers, the experimental and the theoretical
one. The experimental do something and if it fails modifies it not to fail
until 9 out of 10 most of the times works ok. The theoretical one
calculates, considers, reads, asks others and then do something that should
work and if not he says it's the fault of the construction workers :-)

Tamas



On 12/7/06, Hazelwood Lyle <LHazelwood@mfgnc.com> wrote:
>
>
> > Please report to the piclist if you ever get a device that fails at
> > one Vdd and passes at the other. I would be interested in such a
> > result.  Microchip says it won't happen.
>
> It was myself who sent in the reference to AN910 a few days ago,
> which is unclear at best when describing the need for multiple
> voltage verification.
>
> I am not as well educated as many of you here, and would certainly
> not challenge anyones assertions, but I do think it wise to consider:
>
> An Application Note from Microchip may not be a solid basis for making
> sound technical decisions. There was another App Note in the past that
> advocated connecting live AC voltage to an input, with only a high R
> resistor and an assumption that the built-in protection diodes would
> make it "OK".
>
> I guess what I'm saying is that I'd trust the opinions of many people
> on this list over the assertions of any single Microchip AN.
>
> Just my opinion, of course. :-)
>
> Lyle
>
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