Optical Distributor off car

Red -12V

Black- Earth

Blue-signal out

Postion	Voltage
Within interrupter	11.48v
Without interrupter	0.38v
Within interrupter	11.48v
without interrupter	0.38v

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Optical type and hall effect type work in the same way but with a little difference , they use infra red diode instead of the magnet and photo electric cell instead of the Hall IC to create a output voltage to let the ECU know which angle the camshaft or in some cases where crankshaft and reference point where TDC is . Also to trigger the ignition primary. optical and hall effect types create a digital wave form.

This sensor creats a voltage when the infa red hits the photo electric cell(window on the chopper plate) due to the property of the photo electric cell and when the infa red is blocked with part of the chopper plate it produces no voltage in the cell.ey