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help with how to use signal from motorcycle hall effect sensor.

Former Member

need to hook into the hall effect sensor on my motorcycle for an experiment. I am thinking I need to just hook signal to a pin and ground to ground. Sound right?

 

Can I hook to a PWM digital pin?

 

The details for the speed sensor:

Speed sensor output voltage

When sensor is on

DC 4.8 V or more

When sensor is off

DC 0.6 V or less

 

new code with attachInterrupt, will it work?

 

I

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  • Former Member
    Former Member

    Do you want to read the sensor or fake the sensor?
    In either case I doubt PWM will help you, because speed sensor most likely outputs different frequency signal depending on speed, while PWM on arduino has fixed frequency and only on-time of signal vs off-time is varied (duty cycle). Another thing to look for - what output type that sensor has? Since your motorcycle most likely has 12V system and sensor is said to output 4.8 or higher for high and 0.6 or less for low, based on what I have seen in speed sensors, it could be so called open collector output - that means that data pin is pulled high externaly and all that sensor does is pulls it down to ground when needed. You can check if that is the case by disconnecting sensor and checking if there is voltage present on data line coming from instrument panel. Anyway, before connecting arduino to your motorcycle, check carefully what voltages are present, because you can easily damage your arduino if you hit input pins with 12V.

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  • Former Member
    Former Member

    Do you want to read the sensor or fake the sensor?
    In either case I doubt PWM will help you, because speed sensor most likely outputs different frequency signal depending on speed, while PWM on arduino has fixed frequency and only on-time of signal vs off-time is varied (duty cycle). Another thing to look for - what output type that sensor has? Since your motorcycle most likely has 12V system and sensor is said to output 4.8 or higher for high and 0.6 or less for low, based on what I have seen in speed sensors, it could be so called open collector output - that means that data pin is pulled high externaly and all that sensor does is pulls it down to ground when needed. You can check if that is the case by disconnecting sensor and checking if there is voltage present on data line coming from instrument panel. Anyway, before connecting arduino to your motorcycle, check carefully what voltages are present, because you can easily damage your arduino if you hit input pins with 12V.

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