Dave Tweed ha scritto:
> The absolute max voltage on any pin is Vdd + 0.3V, and that applies even if
> Vdd is zero!
> 
> You definitely can break the PIC, not to mention back-driving the regulator
> through the PIC's protection diodes. 78xx regulators don't like that much.


I know, I know Dave :)
So, I should grab the power to be measured *after* the zener. Maybe not 
equally accurate, but will consider that...

Or I could simply state (to the customer) that, if working outside the 
specs (36->72), the device may break...

Dario
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