Optical distributor, this shows the rotor blade switching the light on and off within the distributor. This sends a voltage through to the spark plugs when its turned on.
Hall effect distributor, this switiches the voltage on and off using teeth. As the rotor teeth pass by the stator teeth, this creates a magnetic field which then collapses. Giving the pattern above.
This is the waveform of the Rpm sensor. This shows that the back emf by breaking the magnetic field created by passing the magnets passed each other, creates a negative voltage. The more cylinders the more sections on the pattern.
Hi Jono it would have been nice for you to have explained how these pattern are created
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