wouter van ooijen wrote:
>> Interesting, how could a PCB becomes a comb? You must have 
>> special shape designed on your PCB. Won't the pins on chips 
>> hurt the skin? Some DIP package has very sharp pins. Just curious.
>>     
>
> Through-hole pins won't penetrate a cat's fur down to the skin. I dunno
> what cat you had, but mine used to purr when stroked/brushed with
> anything.
>
> Wouter van Ooijen
>
> -- -------------------------------------------
> Van Ooijen Technische Informatica: www.voti.nl
> consultancy, development, PICmicro products
> docent Hogeschool van Utrecht: www.voti.nl/hvu
>  
>  
>
>   
I assume this discussion is about ESD protection, as the PIC rarely
generates high-energy noise.

I use those tiny 0603/0805 ESD suppressors. While those rated for 5V
would seem to be the best, they have a HUGE capacitance at that voltage
rating. So I normally use 18-26V, which reduces the capacitance to 200pF
or less. In any case, when driving an external signal, please consider the
capacitance.

I attach one to each PIC pin  heading for the outside, or  attached  to any
cable coming into the PIC.  These eliminate failures.

--Bob A
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