whenever an object/person interrupts the beam the receiver then gives a constant stream of 0s.
So if the person takes longer than 500mS to pass the beam you will get more counts. If they stop for a chat you may get 100s 
Rob
whenever an object/person interrupts the beam the receiver then gives a constant stream of 0s.
So if the person takes longer than 500mS to pass the beam you will get more counts. If they stop for a chat you may get 100s
Rob