Reginald Neale wrote:
>
> Geoff Wooton asked:
>
> >This is in response to Martin's method for calibrating a C508. I'm
> >curious as to whether its possible to screen a PIC so that it cannot
> >be "heard" by a short wave radio receiver. Is an aluminium casing
> >sufficient to block the PIC's RC oscillator signal?
>
> Yes, that will probably help a lot. If RF silence is something that
> concerns you, you should also use the lowest oscillator frequency
> consistent with your application, as high frequencies will be much more
> difficult to keep bottled up.
>
> Reg

....and, use the lowest possible supply voltage....
--
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Paul Mathews, consulting engineer
AEngineering Co.

email: optoeng@whidbey.com
non-contact sensing and optoelectronics specialists