>
> Hi:
>
> If I used a Normally Open vibration switch as a PIC input it could be
> connected between Vcc and the input.  A high value resistor between the
> input and ground would pull down the input and I think the current used
> would be minimal.
>
> But if a Normally Closed vibration switch is used is there a circuit
> that would not draw current while waiting for vibration?  A coin cell
> will be powering this circuit.  This type (2 ball) is much more
> sensitive to vibration than the spring over rod type that's N.O. See:
> http://www.pacificsites.com/~brooke/Sensors.shtml#Vibration
>
> Have Fun,
>
> Brooke Clarke


http://www.signalquest.com/product_selection.htm

I've used dozens of thier SQ-SEN-200 with a 5.1 Mohm pull up resistor and a
12F629 that sleeps most of the time, years on a pair of AA batteries.

-Denny
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