> This is a rather big topic. It is really quite important to consider how =
static discharge could affect your
> product through any of its i/o or power inputs or even switches or other =
openings in the case. I usually
> employ a combination of a ferrite bead, ceramic capacitor, and tvs diode =
on every wire which leaves
> or enters the pub.

I'll have a cider please ... oh, I guess you mean PCB, not the pub ... :)

> Sometimes this scheme must be modified because the signal on said wire is=
 too high frequency or
> carries too much current. But the general strategy is absorb-block-clamp.

For high frequency stuff there are a number of TVS type devices designed fo=
r USB2/3 use, so missing a clamp on a line is no excuse these days. In most=
 cases where high current is involved a 1 meg resistor to somewhere that ca=
n act as a grounding point for the static is also generally not a problem, =
but such circuits tend to be low enough impedance that a static build up ge=
nerally isn't a problem.




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