05-09-2020, 01:49 PM
PD if i understand it correctly you can measure the dc voltage across the sensor wires with the connector in place like lp did, as the wheel is slowly rotated to interact with the "tonewheel" as it's called you should be able to measure 8 volts dc which will vary with about one volt either way with every slot.
how fast your voltmeter reads is how fast (read slow) the wheel needs to be rotated from a slot to a ridge in the tone wheel.
If you had a speaker and a capacitor and connected those in series with the same wires you would hear a tone and the frequency would change with the speed of the wheel.
the bike needs to be switched on in both cases to supply dc power to the sensor and the gap between the sensor and the tonewheel is 0.4 mm. quite small and i can see the orientation of the sensor to line up with the gap beiing important as well since we're talking about a slot.
If nothing works you could take the sensor out and do your screwdriver test to see if the sensor is otherwise working.
how fast your voltmeter reads is how fast (read slow) the wheel needs to be rotated from a slot to a ridge in the tone wheel.
If you had a speaker and a capacitor and connected those in series with the same wires you would hear a tone and the frequency would change with the speed of the wheel.
the bike needs to be switched on in both cases to supply dc power to the sensor and the gap between the sensor and the tonewheel is 0.4 mm. quite small and i can see the orientation of the sensor to line up with the gap beiing important as well since we're talking about a slot.
If nothing works you could take the sensor out and do your screwdriver test to see if the sensor is otherwise working.