How to use LDT0 Vibration Sensor Piezo Film with PIC ?

[mmc01]

I want to read data from LDT0 Vibration Sensor Piezo Film. This is data sheet.
http://www.meas-spec.com/downloads/LDT_Series.pdf

I try to read data like this example

http://www.parallax.com/Portals/0/Downloads/docs/prod/compshop/PiezoInfo.pdf

In this example I think it only read high or low input but when I try to read it I can't read anything from sensor. It have no 5V to trigger input high. And If I want to read vibration for build car security how to do it with PIC.

[Mike Walne]

Begin by having a look at the sensor output on a 'scope.

This will tell you:-

(1) Whether the sensor is working or not.
(2) What kind of a signal you're playing with.
(3) The starting point for your coding.

Mike

[SherpaDoug]

The Parallax example works if the sensor is used as a switch, like if you tap it with your finger. If you are looking for vibrations you must look for smaller signals. At least use a PIC A/D pin or better yet use an amplifier.

Mike is right. You need to look at the signal with a scope to see just what you are dealing with.
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