Dal Wheeler wrote:
>at one of the microchip seminars they said one of thier clients had a few
>12
>bit cores embedded in earth drilling bits; must get fairly warm in that
>scenerio --even with the coolant pumping through it...  Me, I've had a
>ceramic dip hot enough to probably boil water on when carelessly wired
>(enough to melt the breadboard) --part still worked after that (well, sort

Our company designs tools for drilling applications and it does get pretty
hot down there. Circuits have to operate at 125C in Canada and 150C or
greater elsewhere in the world -- not to mention the pressure, environmental
and vibration challenges. 125C isn't usually a problem, though. I've found a
few PIC parts (SO/QFP) that can handle this stress and would be interested
if anyone else has had success at high temperatures.

Shawn

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