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Thread: usart to usart
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face BY : fernteix email (remove spam text)



Hi


<Anyway, the point is, the 877's freak out when I touch
>the case or RB3 with my finger.  It skips lines of code, things ground out.
>LED's go off.  buzzers go on...   Swap a 774 into the circuit's ZIF, and
all the
>flaky stuff goes away.

But more interesting, why the
>ceramic package itself does this also?

I all this happened in analog world, without reading other details, I would
think in electric field produced by a finger not grounded ! , injecting
current in high impedance inputs;  and the effect of  humidity lowering the
high impedance of ceramic surface
Is a possibility only, of course.

Fernando

<00fa01bfc705$913e3400$288610d4@default> 7bit

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