1) even before I try to get output from the sensor to the arduino shouldn't the light on the sensor flip on and off with some level of noise?
How do you adjust the varister on the sensor?? How many turns/ which direction makes it more or less sensativity.
Do I turn the screw clockwise or counterclockwise to make the sensor less sensitive??
How do I know when I have reached the screws limit??
Can I damage it by turning too much???
How do I know, can I use a multimeter on the soldier bumps on back to see it change???